Hi,
I was wondering is this brand of EQ and this model decent.?
This is its features
it taked two rca inputs and splits them to the 6 main channels
fronts/rears/sub all rca out.
It has a power ground and remote wire
and a fuse inline in the power wire
it has 7 bands of equalization
it has a sub 75/150 setting on the front
it has a cd set of inputs as well and there are rca in the back for the cd
it has an eq defeat swith on the front
it has a high/low switch on the back ( i am assuming this is to switch between speaker level input - high to rca outs from the deck - low) is that correct?
it is half size
i got it for 15$ used
ANY comments would be most helpful
DKH
Replies (15)
dkh on 06/30/2006 20:13:21
I am really excited to hook this thing up but i am not going to do it yet just in case you guys tell me that it will wreck or damage my system.
Ash on 07/1/2006 01:16:14
Back in the days Sherwood was a decent contender within midline electronics. Their HU's were their best product. Now I'm not even sure they're still around, at least I haven't heard anything.
I would say it is no more than a simple EQ that might fit the bill on a small install with lower quality amps. THD% rates, input/output voltage ranges, and such specs I would imagine to be less than ordinary as back then HU's with higher voltage rca's were expensive.
EQ's now are fairly cheap with a little bit better compatability, the Sherwood may not be of too much use for the trouble.
swez on 07/1/2006 10:32:11
There are several EQ brands out there that have the same features. If installed and set up properly, this can add a whole new dimension to your audio system sound shaping abilities.
However, one thing we don't want, is to add preamp noise to our downstream amplifiers. It is impossible to tell with this unit, what you will get unless you try it. Do you have a link to this item?
Swez
PS Perhaps we can chat about it on YIM and see what options are possible?
dkh on 07/1/2006 17:23:07
There is a guy advertising a parameteric eq in the local paper and he originally paid 1000 dollars for it he said. Now he wants 200 but will sell it for 150.
I am really thinking i am gonna try the sherwood out, at least i will be able to fade from front to rear with it.
I already glued a board to the top of it so that i can screw it in where the ashtray use to be. So i am committed to it somewhat.
dkh on 07/2/2006 23:40:47
I installed the sherwood eqand it seems to be working really good.
I havenet noticed any excess noise yet. Plus the 7 band equalization is pretty cool compared to the eq in my sony deck.
I grounded it to the the same wire i grounded my deck to which is not the factory ground but a wire run to the right to the the metal bracket where the steering column is located. Is this correct grounding procedure or shoud i run a wire to the floor?
swez on 07/3/2006 09:05:24
If you are noise free now, chances are good that ground is working for you. However, if a engine noise or other non-musical elements begin to crop up later, move the ground for the firewall or floor pan.
FYI: This EQ has a line driver feature in it too. You may have to adjust amp gains to keep the amp(s) from clipping prematurely. Also, whe using EQ, it is better to cut frequencies below 0dB reference and use minimal boost on bands that need some help. A +3,+6 dB boost is plenty on any given band in the EQ.
Swez
dkh on 07/3/2006 18:42:00
Are you positive this eq has a line driver in it, did yu see the voltages anywhere? I couldnt find the model anywhere online. I tend to think that yes it does though because my system seems slightly louder at less volume on the head unit. before i was going to around 27 to 30 on my sony hu which can go to 34. Now i am only going to about 22 and it is loud.
I adjusted my amp gains up slightly so i geuss i should turn them down, but i have been kind of going by ear for distortion. I did hear my sub yesterday bottoming out, it was hitting something in there and i caught it and turned the sub down.
How do you know what is +3 and +6 on the boosts? Also, do you mean only adjust down from the middle setting of each band to get the right sound? Dont go over the middle point on any band?
Thanks DKH
swez on 07/3/2006 19:10:50
Most of the EQ's like this one, all have line drivers too. These are "active" filters that can cut and boost frequencies with final stage amplfiers. (Low power amps though) They cannot drive a speaker however.
Yes, the center point of each band is considered "flat". (No boost, no cut) Most EQ's offer a +/- 12dB boost/cut range. Consider the knobs on each EQ band as the face of a clock. It goes sort of like this:
7:00 = -12dB cut
9:00 = - 6dB cut
11:00 = -3dB cut
12:00 = No cut, no boost ("Flat")
1:00 = +3dB boost
3:00 = +6dB boost
5:00 = +12dB boost
Try to keep all boosted bands at or below +6dB (3:00 points). Also, each band has some cut/boost effects adjacent bands. Typically, the lows under 200 Hz will need a little boost as will the highs above 5,000 Hz. Everything in the middle of these frequencies, the ears can usually hear very well and speakers produce highest output in that range too.
Swez
PS It's very good idea to adjust your amp gains to less sensitivity settings. (Ie: If amp gains are at say ~1 volt now, move them to ~3 volts) That should keep your amps from going into clipping mode and damage your speakers.
dkh on 07/3/2006 19:21:36
Right on man. Thanks again for the info.
Actually i am wondering about my ground location. I have speaker "hiss" when the volume is low. Is this normal?
Also, this eq has a sub control in it that goes 75 or 150 hz depending on where it is at. Is 150 considered midbass? Because if it is then maybe i would be better off to hook up my 8" RF punch sub to the eq and put it on 150 hz setting and then run my 10" type R off the sony hu sub controller at 78 or 125 hz.
My pioneer amp i use to run the 10" has no dial for the frequency it just has an lpf switch that has a cut off frequency of 80 hz, so with this switch on then i geuss its pointless to turn the sony hu to 125 hz. It also has a bass boost level control switch which goes 0, 6 and 12 db respectively, I have it set at 0 boost since i bought the amp last week, it seems like an ok amp, it hasnt cut out once on me.
I am reserving my usa2200 for my other two subs maybe, or use it on my polk audio 6x9's when i get them back from the manufacturer.
Ok thanks again
dkh
swez on 07/3/2006 20:20:02
"Hiss" at high frequencies is common from cheaper preamps and filtering circuits. It will be more noticable at 4K and up EQ boost. If you adjust the amp gains as noted for the mid/high amps, the hiss may be less noticable.
150 Hz is upper bass and/or lower region of MB frequencies. If you hear non-bass signals like vocals & guitar bleading through at that setting, use the 75 Hz., select.
As for your 8" woofer, set it aside for another project later. It might make a nice woofer for your computer audio system?
When you get your Polks back, the 2200 might be a tad strong for them and you may get some degree of strong rear stage, weak front stage balancing problems. If that EQ has a fade control function, this will help get things under control. Or, use the amp gains to balance things out. Use the HPF on your 2200, set at ~75-80 Hz. This will give good MB in the back stage too.
Finally, where do the 6x9's mount in this vehicle?
Swez
dkh on 07/3/2006 20:44:50
The blazer doesnt have 6x9 mounts so i had to be creative. I posted some pics of my sys. Here is the link
http://photos.yahoo.com/dakota_kawasaki_hybrid
It doesnt show my other set of 6x9 boxes i am going to use for my polks, basically they are sealed oversize lengthwise standard truck style 6x9 boxes. Ugly white with speckles on them, i should go paint them or something.
dkh on 07/3/2006 20:48:21
If you look in the pictures i robbeb a minivan i think it was a nissan, of its speaker boxes. They have some soft fill material in them from the factory and if you look closely they have a port in the bottom to let the bass out. Is this a bad idea to have a port there as maybe the bass i get from my 10" might get in there and hurt the 6x9's?
swez on 07/4/2006 09:26:30
The speaker mounts for your 6x9's are very creative. They look a bit "un-finished" at the moment, but what the hey... it'll work. A pair of 6x9 wedge boxes might have a better look and match the rest of your system though??? Port in them should be sealed up. A sealed unit is best when you have a sub.
http://www.cardomain.com/item/QLCQL69WMP
The 8" Punch on top is not a good idea. It's a flying object, waiting to skull some poor guy in the front seats in the event of an accident. I don't see a need for it with the sub and 6x9's back there already.
That vertical rack you made might be useful as an amp rack. All your wiring, crossovers and amps can be mounted on shelves. Then use metal mesh screening panels to protect the amps, yet allow airflow too. The lower the profile, the better. They can be found at Home Depot and paintable too.
As a security option, tint your rear and side windows too. That will hide what's inside the cargo area from most prying eyes. This will also keep your truck cooler in the summer heats too.
Swez
Victor on 07/4/2006 09:45:52
apart from everything else, i wud just like to make one comment here, that is a very messy job out there in those pics,, you need to tidy up the place,,
secure the sub , and most importantly those wildly running wires need to be set right..
Victor...
dkh on 07/4/2006 11:29:45
Yes i know. I am just in the process of getting everything hidden under the carpet wiring wise. I know it is a ratsnest right now but i want to make sure i got the correct wiring done before i go through the trouble of hiding all the wires.
Now the only thing bad about these minivan speaker boxes is they will never be airtight and also they rattle somewhat even though i sealed all the parts that bolt together with glue. Also, the port i geuss needs to be closed up. Crap mayb i should just mount my white speaker boxes and be done with it.
I already mounted two of my amps to the floor, one is hidden under the drivers seat the one that runs my 4 channels USA4060, and the pioneer is mounted to the floor right behind that other amp, visible but i can throw a mat over it when i leave my vehicle. So i dont think i will mount the amp to the racking system, but a good suggestion nevertheless.
The sub box on the top housing my other 10" RF sub isnt even wired to an amp. I mostly mounted it up there in order to make the structure so big that there would be (short of unscrewing alot of screws) no way to remove the speakers. I am going to bolt the 8" box to the roof as well so that the hole structure is one solid unit from floor to ceiling. This way i will get rid of most rattling and also provide the necessary structure to keep everything in place in the event of an accident. Also, i am going to add security cable around the sub boxes and maybe the 6x9 boxes that has a loop in it like a lassoo and have all the points bolted to the back of the blazer somewhere so that they will stop the objects from flying as well.
thanks for your guys input i am learning daily.
Cheers DKH
I was wondering is this brand of EQ and this model decent.?
This is its features
it taked two rca inputs and splits them to the 6 main channels
fronts/rears/sub all rca out.
It has a power ground and remote wire
and a fuse inline in the power wire
it has 7 bands of equalization
it has a sub 75/150 setting on the front
it has a cd set of inputs as well and there are rca in the back for the cd
it has an eq defeat swith on the front
it has a high/low switch on the back ( i am assuming this is to switch between speaker level input - high to rca outs from the deck - low) is that correct?
it is half size
i got it for 15$ used
ANY comments would be most helpful
DKH
Replies (15)
dkh on 06/30/2006 20:13:21
I am really excited to hook this thing up but i am not going to do it yet just in case you guys tell me that it will wreck or damage my system.
Ash on 07/1/2006 01:16:14
Back in the days Sherwood was a decent contender within midline electronics. Their HU's were their best product. Now I'm not even sure they're still around, at least I haven't heard anything.
I would say it is no more than a simple EQ that might fit the bill on a small install with lower quality amps. THD% rates, input/output voltage ranges, and such specs I would imagine to be less than ordinary as back then HU's with higher voltage rca's were expensive.
EQ's now are fairly cheap with a little bit better compatability, the Sherwood may not be of too much use for the trouble.
swez on 07/1/2006 10:32:11
There are several EQ brands out there that have the same features. If installed and set up properly, this can add a whole new dimension to your audio system sound shaping abilities.
However, one thing we don't want, is to add preamp noise to our downstream amplifiers. It is impossible to tell with this unit, what you will get unless you try it. Do you have a link to this item?
Swez
PS Perhaps we can chat about it on YIM and see what options are possible?
dkh on 07/1/2006 17:23:07
There is a guy advertising a parameteric eq in the local paper and he originally paid 1000 dollars for it he said. Now he wants 200 but will sell it for 150.
I am really thinking i am gonna try the sherwood out, at least i will be able to fade from front to rear with it.
I already glued a board to the top of it so that i can screw it in where the ashtray use to be. So i am committed to it somewhat.
dkh on 07/2/2006 23:40:47
I installed the sherwood eqand it seems to be working really good.
I havenet noticed any excess noise yet. Plus the 7 band equalization is pretty cool compared to the eq in my sony deck.
I grounded it to the the same wire i grounded my deck to which is not the factory ground but a wire run to the right to the the metal bracket where the steering column is located. Is this correct grounding procedure or shoud i run a wire to the floor?
swez on 07/3/2006 09:05:24
If you are noise free now, chances are good that ground is working for you. However, if a engine noise or other non-musical elements begin to crop up later, move the ground for the firewall or floor pan.
FYI: This EQ has a line driver feature in it too. You may have to adjust amp gains to keep the amp(s) from clipping prematurely. Also, whe using EQ, it is better to cut frequencies below 0dB reference and use minimal boost on bands that need some help. A +3,+6 dB boost is plenty on any given band in the EQ.
Swez
dkh on 07/3/2006 18:42:00
Are you positive this eq has a line driver in it, did yu see the voltages anywhere? I couldnt find the model anywhere online. I tend to think that yes it does though because my system seems slightly louder at less volume on the head unit. before i was going to around 27 to 30 on my sony hu which can go to 34. Now i am only going to about 22 and it is loud.
I adjusted my amp gains up slightly so i geuss i should turn them down, but i have been kind of going by ear for distortion. I did hear my sub yesterday bottoming out, it was hitting something in there and i caught it and turned the sub down.
How do you know what is +3 and +6 on the boosts? Also, do you mean only adjust down from the middle setting of each band to get the right sound? Dont go over the middle point on any band?
Thanks DKH
swez on 07/3/2006 19:10:50
Most of the EQ's like this one, all have line drivers too. These are "active" filters that can cut and boost frequencies with final stage amplfiers. (Low power amps though) They cannot drive a speaker however.
Yes, the center point of each band is considered "flat". (No boost, no cut) Most EQ's offer a +/- 12dB boost/cut range. Consider the knobs on each EQ band as the face of a clock. It goes sort of like this:
7:00 = -12dB cut
9:00 = - 6dB cut
11:00 = -3dB cut
12:00 = No cut, no boost ("Flat")
1:00 = +3dB boost
3:00 = +6dB boost
5:00 = +12dB boost
Try to keep all boosted bands at or below +6dB (3:00 points). Also, each band has some cut/boost effects adjacent bands. Typically, the lows under 200 Hz will need a little boost as will the highs above 5,000 Hz. Everything in the middle of these frequencies, the ears can usually hear very well and speakers produce highest output in that range too.
Swez
PS It's very good idea to adjust your amp gains to less sensitivity settings. (Ie: If amp gains are at say ~1 volt now, move them to ~3 volts) That should keep your amps from going into clipping mode and damage your speakers.
dkh on 07/3/2006 19:21:36
Right on man. Thanks again for the info.
Actually i am wondering about my ground location. I have speaker "hiss" when the volume is low. Is this normal?
Also, this eq has a sub control in it that goes 75 or 150 hz depending on where it is at. Is 150 considered midbass? Because if it is then maybe i would be better off to hook up my 8" RF punch sub to the eq and put it on 150 hz setting and then run my 10" type R off the sony hu sub controller at 78 or 125 hz.
My pioneer amp i use to run the 10" has no dial for the frequency it just has an lpf switch that has a cut off frequency of 80 hz, so with this switch on then i geuss its pointless to turn the sony hu to 125 hz. It also has a bass boost level control switch which goes 0, 6 and 12 db respectively, I have it set at 0 boost since i bought the amp last week, it seems like an ok amp, it hasnt cut out once on me.
I am reserving my usa2200 for my other two subs maybe, or use it on my polk audio 6x9's when i get them back from the manufacturer.
Ok thanks again
dkh
swez on 07/3/2006 20:20:02
"Hiss" at high frequencies is common from cheaper preamps and filtering circuits. It will be more noticable at 4K and up EQ boost. If you adjust the amp gains as noted for the mid/high amps, the hiss may be less noticable.
150 Hz is upper bass and/or lower region of MB frequencies. If you hear non-bass signals like vocals & guitar bleading through at that setting, use the 75 Hz., select.
As for your 8" woofer, set it aside for another project later. It might make a nice woofer for your computer audio system?
When you get your Polks back, the 2200 might be a tad strong for them and you may get some degree of strong rear stage, weak front stage balancing problems. If that EQ has a fade control function, this will help get things under control. Or, use the amp gains to balance things out. Use the HPF on your 2200, set at ~75-80 Hz. This will give good MB in the back stage too.
Finally, where do the 6x9's mount in this vehicle?
Swez
dkh on 07/3/2006 20:44:50
The blazer doesnt have 6x9 mounts so i had to be creative. I posted some pics of my sys. Here is the link
http://photos.yahoo.com/dakota_kawasaki_hybrid
It doesnt show my other set of 6x9 boxes i am going to use for my polks, basically they are sealed oversize lengthwise standard truck style 6x9 boxes. Ugly white with speckles on them, i should go paint them or something.
dkh on 07/3/2006 20:48:21
If you look in the pictures i robbeb a minivan i think it was a nissan, of its speaker boxes. They have some soft fill material in them from the factory and if you look closely they have a port in the bottom to let the bass out. Is this a bad idea to have a port there as maybe the bass i get from my 10" might get in there and hurt the 6x9's?
swez on 07/4/2006 09:26:30
The speaker mounts for your 6x9's are very creative. They look a bit "un-finished" at the moment, but what the hey... it'll work. A pair of 6x9 wedge boxes might have a better look and match the rest of your system though??? Port in them should be sealed up. A sealed unit is best when you have a sub.
http://www.cardomain.com/item/QLCQL69WMP
The 8" Punch on top is not a good idea. It's a flying object, waiting to skull some poor guy in the front seats in the event of an accident. I don't see a need for it with the sub and 6x9's back there already.
That vertical rack you made might be useful as an amp rack. All your wiring, crossovers and amps can be mounted on shelves. Then use metal mesh screening panels to protect the amps, yet allow airflow too. The lower the profile, the better. They can be found at Home Depot and paintable too.
As a security option, tint your rear and side windows too. That will hide what's inside the cargo area from most prying eyes. This will also keep your truck cooler in the summer heats too.
Swez
Victor on 07/4/2006 09:45:52
apart from everything else, i wud just like to make one comment here, that is a very messy job out there in those pics,, you need to tidy up the place,,
secure the sub , and most importantly those wildly running wires need to be set right..
Victor...
dkh on 07/4/2006 11:29:45
Yes i know. I am just in the process of getting everything hidden under the carpet wiring wise. I know it is a ratsnest right now but i want to make sure i got the correct wiring done before i go through the trouble of hiding all the wires.
Now the only thing bad about these minivan speaker boxes is they will never be airtight and also they rattle somewhat even though i sealed all the parts that bolt together with glue. Also, the port i geuss needs to be closed up. Crap mayb i should just mount my white speaker boxes and be done with it.
I already mounted two of my amps to the floor, one is hidden under the drivers seat the one that runs my 4 channels USA4060, and the pioneer is mounted to the floor right behind that other amp, visible but i can throw a mat over it when i leave my vehicle. So i dont think i will mount the amp to the racking system, but a good suggestion nevertheless.
The sub box on the top housing my other 10" RF sub isnt even wired to an amp. I mostly mounted it up there in order to make the structure so big that there would be (short of unscrewing alot of screws) no way to remove the speakers. I am going to bolt the 8" box to the roof as well so that the hole structure is one solid unit from floor to ceiling. This way i will get rid of most rattling and also provide the necessary structure to keep everything in place in the event of an accident. Also, i am going to add security cable around the sub boxes and maybe the 6x9 boxes that has a loop in it like a lassoo and have all the points bolted to the back of the blazer somewhere so that they will stop the objects from flying as well.
thanks for your guys input i am learning daily.
Cheers DKH
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