would this system work?

by 65_nova
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I'm going for spl, and i would like to know which of these subs would work best with this amp? Also, which is better, mtx or rockford fosgate?
Subs-
http://www.thezeb.com/detail.aspx?ID=5683
http://www.sounddomain.com/sku/MTXT610X2D

Amp-
http://www.sounddomain.com/sku/BOSC800




Replies (11)
compvr15s on 03/20/2004 18:38:58
im not too familiar with them subs but im sure you can find better, may have to spend a lil more money but am pretty sure will be more satisfied than with the ones you posted. the mtxs are also not so good, mtxs subs lack in areas. what type of vehicle do you have, what music do you listen to what size subs do you want, whats your price range. let us know this info and we can answer your question much better

swez on 03/20/2004 19:01:53
There are so many great choices out there in subs and amps.

The MTX subs noted, will not work on this amp as shown. This enclosure is a 2 ohm load. That means either 4 ohm voice coils (SVC) or a pair of 2+2 DVC's. You'd have to find out what these subs are and rewire them a bit, depending on the sub used. Need a 4 ohm load to each bridged channel of that amp mentioned.

I could not find that RF sub mentioned. Just got a server error. Some of the high SPL subs that come from Audiobahn, would be a good option as these are made for high SPL and smaller amps.

1. http://www.ikesound.com/product-product_id/1480 $40.00 each
Audiobahn AW1051T ; 10” Natural Sound Woofer

Audiobahn AW1051T
10” Natural Sound Woofer
45 oz. Strontium Magnet
Power Handling: 300 watts R.M.S.
Frequency Response: 28Hz - 1kHz
Efficiency: 91 dB
PHAT Foam Surround
Non- Pressed, Non-Transfer Paper Cone
KM3’ Coated for Virtually No Cone Distortion
2” 4-Layer ASV Voice Coil
Dual 4 Ohm
2 Ohm or 8 Ohm Operation
Mounting Dimensions: Depth; 4 5/8” Hole; 9” Diameter; 10 1/4”
Lug Lock Terminals
Patent Pending
NOTE: Sealed or ported is good here.

2. http://www.sounddomain.com/sku/ABNAW100T (<$100.00?)
Audiobahn AW100T

Subwoofer Specifications

Size: 10 inch
Rec. Sealed Box Dims: not recommended
Rec. Ported Box Dims: 0.65 - 2.35 cu.ft.
Free Air Usage: not recommended
Sensitivity: 92.3 dB
Frequency Response: 29-1000 Hz
Recommended RMS Power: 400W
Peak Power Handling: 800W
Impedance: 4 ohms
NOTE: This sub is designed for ported box designs only. Louder in a ported enclosure too.


===================================================

The Boss 4 channel C800 is not a bad 4 channel amp... especially for interior speakers. Looks like 100 x 4 RMS watts or maybe 275 watts RMS x 2 when bridged. The specs are a little light on details here, but the price is low. A better choice amp would be a MONO Class D amp. These are made for subs and some models can drive 1 or 2 ohm loads with ease. Class D amps are much more efficient than 2/4 channel Class A/B amps. Less current draw, more output watts too.

Class A/B eff: 50 - 60%
Class D eff: 90 % or higher
===================================================

1. JBL BP-600.1 $219.00
Subwoofer Mono Amp Specifications
http://www.sounddomain.com/sku/JBLBP6001

Amplifier Type: Mono
RMS Power: 300W x 1 @ 4 ohms
RMS Power: 600W x 1 @ 2 ohms (1 ohm stable too)
THD at Rated RMS Power: 0.1%
Speaker Level Inputs: Yes
Preamp Outputs: No
Built-In Crossovers: LP
Bass Boost: 0-6 dB
Frequency Response: 10-320 Hz
Channel Separation: n/a
Signal to Noise Ratio: >100 dB
Fuse Rating: 2 x 30 amps

2. HiFonics
Nemesis NX750D ($279.00)
http://www.sounddomain.com/sku/HIFNX750D

Subwoofer Mono Amp Specifications:
Amplifier Type: Mono
RMS Power: 175W x 1 @ 4 ohms
RMS Power: 400W x 1 @ 2 ohms
RMS Power: 750W x 1 @ 1 ohm stable
THD at Rated RMS Power: <0.08%
Speaker Level Inputs: No
Preamp Outputs: Yes
Built-In Crossovers: LP
Bass Boost: 0 - 18 dB
Frequency Response: 10-400 Hz
Channel Separation: >70 dB
Signal to Noise Ratio: >96 dB
Fuse Rating: 80 amps

Audiobahn A8000T (Price unknown)
Subwoofer Mono Amp Specifications
http://www.sounddomain.com/sku/ABNA8000T

Amplifier Type: Mono
RMS Power: 400W x 1 @ 4 ohms
RMS Power: 800W x 1 @ 2 ohms (not 1 ohm stable)
THD at Rated RMS Power: 0.02%
Speaker Level Inputs: Yes
Preamp Outputs: Yes
Built-In Crossovers: LP
Bass Boost: 0 - 18 dB
Frequency Response: 10-40,000 Hz
Channel Separation: n/a
Signal to Noise Ratio: > 100 dB
Fuse Rating: 2 x 30 amps


Boss Chaos C1200 $179.00
Subwoofer Mono Amp Specifications
http://www.sounddomain.com/sku/BOSC1200

Amplifier Type: Mono
RMS Power: 400W x 1 @ 4 Ohms
RMS Power: 600W x 1 @ 2 Ohms (not 1 ohm stable
THD at Rated RMS Power: 0.01 %
Speaker Level Inputs: Yes
Preamp Outputs: Yes
Built-In Crossovers: LP
Bass Boost: 0 - 18 dB
Frequency Response: 20-20,000 Hz
Channel Separation: n/a
Signal to Noise Ratio: 102 dB
Fuse Rating: n/a

These are all good amps.. especially the HiFonics and JBL. The Boss amp... cheaper... but still 600 RMS @ 2 ohms. Nothing to sneeze at for that price.

Swez










65_nova on 03/21/2004 00:46:02
I've got a 65 nova, and i'm usuall listening to rap music, or pink floyd...i'm thinking of going with the boss amp swez mentioned with the $40 dollar audiobahn subs, and either build my own box or get one from sounddomain.com...will they bump harder than those rockfords 10 inch rockfords? i just want tem inch subs, to fill the trunk with bass...thanks, this has really helped me out

blacktallon2000 on 03/21/2004 02:49:27
Why do people like buying boxes online. A friend of mine did it just last week and it cost him a ton in shipping costs alone. Why not just go to your local Flea Market. There are usually car audio shops in them and you can get some good deals on boxes. They usually have them for about $60. Just make sure the box is at least 5/8 " MDF and the internal volume is right about what the Sub manufacturer suggest. And that it'll fit in your trunk(may sound silly but it happens) Oh yeah I'd go with the Audiobahn subs, I have personal experience with them. They sound incredible. And Amp wise I'd choose the JBL BP600.1, the BOSS amp is nice but they usually overate their amps. If you want an amp that'll rock those subs I'd go for the JBL. Installed my first one three weeks ago and let me tell you, the sound was crazy. And they just don't get hot. Incredible

swez on 03/21/2004 10:21:16
If you plan to stick with the Boss C800, make sure your subs are single voice coil 4 OHM versions or 2+2 Dual coil types. A 4+4 dual coil will not work on that amp.

Also, if you go with the Boss C1200 Mono amp, the $40.00 subs will not work well as this is a 1 or 4 ohm load. (depending on wiring) You'd have to wire them for 4 ohms and get ~150 watts RMS to each sub.

Let's see if I can fine a low budget sub that will work with the C1200 amp.

This will work:
http://www.thezeb.com/detail.aspx?ID=441
Audiobahn AW100Q
$59.00 each at Zeb
No Specs available off site link, but probably similar to AW100T
===================================================
Audiobahn AW100T $59.00
http://www.acaraudio.com/product_info.php?cPath=24_48&products_id=1013

• 10" Excursion Subwoofer
• 60 oz. Strontium Magnet
• Power Handling: 400 watts RMS
• Frequency Response: 29Hz - 1kHz
• Efficiency: 92.3 dB
• PHAT 2” Foam Surround
• Non- Pressed, Non-Transfer Paper Cone
• 2” 4-Layer ASV Voice Coil
• Single 4 Ohm
• Mounting Dimensions: Depth; 5” Hole; 9” Diameter; 10-1/4”
• Lug Lock Terminals
===================================================
http://www.justwoofers.com/

2JBL-GT100 TWO JBL GT SERIES SUBWOOFERS $109.99/pr.
GT100
10" SVC GT120
Power Handling, RMS: 250 Watts
Power Handling, Peak: 1000 Watts
Frequency Response (±3dB): 28Hz - 500Hz
Sensitivity: 90dB
Impedance: 4 Ohms
===================================================
In short, you will need a pair of SVC, 4 ohm subs for the C1200 amp.The AW1051T will not work here. There is no way to wire them to get the most or be safe with this amp.

Swez





65_nova on 03/21/2004 13:00:38
Thanks Swez, this has really helped alot...I'm leaning towards the Audiobahn subs with that Boss amp, and either a bought box from Traders Village or a custom built one to show off the flames...amd maybe a spot to mount my amp...I cannot stress how helpful you have been


swez on 03/21/2004 18:41:14
The sealed enclosure range for these subs, are between .50 -1.25 cf internallly per sub. Best every day listening will be about 1.0 cf/sub SEALED.

Swez

65_nova on 03/21/2004 21:47:42
could you explain how sealed boxes and vented boxes would make the sound differ on these subs?

swez on 03/21/2004 22:14:05
Sealed boxes tend to give a smooth performance curve, but may lack the overall SPL of other box designs. If we go to the large end if the spec for a sealed box, the low bass is better, but the power handling of the sub is reduced.

In a Ported box, the lows can have more impact, based on the tuning frequency chosen. A bit more efficient, so you can anticipate a bit more SPL near port tuning frequencies. The box is larger than sealed, but so is output. (~+3dB)

Some subs are designed only for sealed, some only for ported and other will do well in both enclosures. The Theil/Small parameters tell the story as does the "EBP" (Efficiency Bandwidth Product) spec of a sub.

There is an Article in our DIY reference library by CPLKITTLE that explains this in detail.

Swez

cplkittle on 03/22/2004 00:12:10
thanks Swez...
the basics are as follows:

Sealed:

Pros:
tighter bass, faster response (better accuracy), improved high end bass.
Cons:
need around 25% more power, loss on low end bass, 3dB loss compared to ported.

Ported:

Pros:
Deeper lows, 3dB louder (+3dB=2x volume), ~ 25% less power needed.
Cons:
Slower response (not as accurate), loss of high end bass frequencies.

Another favorite is the Bandpass enclosure. Most enclosures in this category are dual 4th order bandpasses which means there are two subs that share the same sealed portion. A bandpass enclosure is one that has a slightly larger than recommended sealed side of the speaker, while the other side is ported. It does not matter which side is sealed and which is ported. It is called a bandpass because it allows only the frequencies in the middle of the band to pass through. Basically the enclosure itself acts as a high pass and a low pass filter. The sealed side of the enclosure provides the resistance needed to restrict subsonic frequencies, and the overall design filters out the higher frequencies. This dosen't mean that you don't need to use a LPF on this enclosure (why amplify something that you aren't going to use?) This enclosure is the middle ground between the sealed and ported enclosures. It is most efficient within its bandpass frequencies (which are defined by the ported and sealed volumes of the enclosure).

swez on 03/22/2004 08:03:02
QUOTE: "Pros: Deeper lows, 3dB louder (+3dB=2x volume), ~ 25% less power needed."

FYI: +3dB is doubling the power to sub in watts. You can hear the difference. To double the overall volume, (100% increase in loudness) it is a +9dB gain factor.

I used to get them confused too... but after a while, it's a no brainer.

Swez




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