Subwoofer amp for dual 4ohm drivers

[Topend]

Hi,

Are there any quality amps available that can drive dual 15" drivers each rated at 4ohms? I prefer a rack/shelf mounted amp but would go with a plate amp if it had XLR inputs.

I have some enclosures that I made last year that I intended to use for a Rythmik F25 kit. I'm now looking at fitting a pair of Dayton RSS390HF-4 drivers to each enclosure.

The Dayton SA1000 amp is good for a single driver but will not power two drivers @ 2ohms. If it is all too hard then I will just have to cough up the money for the Rythmik kit.

Cheers,
Dave.

[Darksky]

Dave, just follow through with your plan and get the servo set up that you had planned on. I would not trade my two Rythmik subs. Bite the bullet and spend the dollars.

[PGT]

Do you need a crossover onboard?

[garym]

Nov 3, 2013 0:10:01 GMT -5 Topend said:

Hi,

Are there any quality amps available that can drive dual 15" drivers each rated at 4ohms? I prefer a rack/shelf mounted amp but would go with a plate amp if it had XLR inputs.

Have you looked at the Behringers? The EP2000 will deliver 650W x 2 into two ohm loads, and has XLR inputs.

www.parts-express.com/pe/showdetl.cfm?partnumber=248-746

[Topend]

Nov 3, 2013 7:55:24 GMT -5 PGT said:

Do you need a crossover onboard?

No.

[Topend]

Nov 3, 2013 0:21:02 GMT -5 Darksky said:

Dave, just follow through with your plan and get the servo set up that you had planned on. I would not trade my two Rythmik subs. Bite the bullet and spend the dollars.

The F25 kits are out of stock. I will if they have them around Dec/Jan.

Dave.

[Topend]

Nov 3, 2013 9:07:17 GMT -5 garym said:

Nov 3, 2013 0:10:01 GMT -5 Topend said:

Hi,

Are there any quality amps available that can drive dual 15" drivers each rated at 4ohms? I prefer a rack/shelf mounted amp but would go with a plate amp if it had XLR inputs.

Have you looked at the Behringers? The EP2000 will deliver 650W x 2 into two ohm loads, and has XLR inputs.

www.parts-express.com/pe/showdetl.cfm?partnumber=248-746

How do the Behringers rate for SQ? They are what I'm after, thanks.

Dave.

[Darksky]

Nov 3, 2013 13:11:28 GMT -5 Topend said:

Nov 3, 2013 0:21:02 GMT -5 Darksky said:

Dave, just follow through with your plan and get the servo set up that you had planned on. I would not trade my two Rythmik subs. Bite the bullet and spend the dollars.

The F25 kits are out of stock. I will if they have them around Dec/Jan.

Dave.

Damn. They must be selling like hotcakes. I can definitely understand why you would not want to wait any longer.

I wonder if you could call and ask Brian to put something together for you because you have waited so long.

One thing I noticed is the Parts Express flat pack 15 inch box. It is quite cheap, you could then do two of the F15HP CI kits.

I know you have been sitting on that F25 box for at least a year. What a drag.

[Deleted]

ep4000, inuke 3000 or 6000, CV5000, Crown 1500, 2500. There are tons that will drive those drivers perfectly. There will be no SQ difference with any of the amps as long as you don't overdrive your sub. You may have to do a fan mod if they are in the same room and you want them to be quite.
Personally, I think servo controlled subs are a joke and you can get the exact same SQ from any properly designed sub but in rythmiks case, they use good drivers and good amps and people seem to like them but the servo controlled aspect is nothing more than a snake oil marketing gimmick. It's never been proved to be any more accurate than anything else. Same goes for my old paradigm Servo 15s, they were great subs in their days but there s good reason that very few companys employ servo tech into their offerings.

Keep in mind, thats just my opinion, others will vary of course.

[cwmcobra]

Dave, how sensitive will your completed subs be? I recently built a pair of Bill Fitzmaurice Tuba Home Theater subs using those Dayton drivers. These are super high sensitivity folded horn cabinets (>100 dB sensitivity) and Bill says 100W per sub will drive them accurately and at high levels. I picked up a used QSC 4-channel amp to try and used 2 of the 4 channels in parallel mode fed from my UMC-1 to power the THTs. The QSC puts out 250W/channel into 4 ohms and drives the THTs with absolutely no strain. Only issue is the amp has a fan in it. When Big Dan announced the Sherbourn merger sale in August I decided to try a lower powered amp with no fans and bought a PA 4Z-75. This is rated at 150W/channel into 4 ohms and is stable to 2 ohms. I hooked it up and after adjusting the sub output levels in the UMC-1 to match those of the QSC amp due to the different gains of the amps, the Sherbourn produced the same effortless tight bass that the QSC did. And the 4Z-75 will look great in the rack with the PA 7-350 that I also bought. Both are in boxes now waiting for my home theater to be completed.

My point is that those drivers can be driven with relatively low powered home or commercial amps depending on the cabinet they are installed in. You might want to find a used pro amp to try out. If happy with it, you can decide to keep it or buy a new version of something similar. Let us know what you end up with for power and how they sound!

Cheers!

Chuck

[selkec]

Any of the amps N8 mentioned will do the job much better than the Dayton you mentioned. I had that Dayton amp once. It did not last thru one song before it went up in smoke. Never again.

[PGT]

I've currently got XLS-1500's and I started with a Behringer EP4000. Can't go wrong with either, though the Crown's are easier to deal with (1/3 the weight of the Behringer).

[selkec]

If you keep an eye out on ebay you can score the ep4000 for 279

[PGT]

there's a pair of used ones on AVS for $250/ea + shipping. I think I paid $300 new on mine from Amazon but they're going for $380 these days. I only sold mine because I scored a trio of XLS1500's for $875/shipped (new).

[Topend]

Thanks for all the replies. I'm seriously looking at the EP4000 now.

Cheers,

[Jim]

Nov 3, 2013 19:34:06 GMT -5 Topend said:

Thanks for all the replies. I'm seriously looking at the EP4000 now.

Cheers,

You should. It is/was the "go to" amp for many bass heads on AVS for a very long time. Cheap, clean, lots of power.

[Topend]

I should note that I really do like my Rythmik sub. It is the first sub that has been worthy of integrating with my 2 channel music. The LF just blends into the sound coming from my mains and matches their SQ.

Cheers,
Dave.

[Topend]

Can anyone advise what freq the RSS390HF-4 should go down to in a 3ft3 sealed enclosure?

Thanks.

[Deleted]

If you boost it with some EQ, it should be ok to about 20hz. They don't have huge xmax for HT but they are great sounding subs and will still do the job very well. The new unimax 15 : www.parts-express.com/pe/showdetl.cfm?partnumber=295-514 /would be a better all around sub. More xmax for HT usage and excellent SQ. Its a better built driver and will be able to go lower than 20hz in the same 3cf cabs with some EQ.

I should say I've used both a few times and the build quality of both is very good. The unimax had a bit of outside design help and improves on thing that the 390 lacks.

[Topend]

Thanks N8DOGG,

Will powering two 2ohm drivers be ok for one EP4000 amp?

Edit: I've checked the specs and it will power 2x 2ohm drivers.

Cheers,
Dave.