"Efficient" Small Speakers

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Posted by Eli Duttman on October 19, 1999 at 14:04:18

I am very interested in acquiring a pair of small efficient speakers that will be used with "flea" power amplification. I am a NYC apartment dweller and there is simply no space for 2 big boxes. I run a vertical biamp with an electronic crossover between the preamp and the power amps. A modified Polk LF14 handles the low bass. My current "main" speakers are a pair of ProAc Tablettes (1st generation) that are not a good match for low power SET amplifiers.

MCM sells a .55 cubic foot enclosure with a blank baffle that will fit into the available space. Backing a hunch, I ran a computer simulations for 4 Audax HT080M0 paper cone drivers in the .55 cuft box. The result of a vented box tuned to 63 Hz. looks pretty good (flat within 1.5 dB from 60 Hz.). This driver configuration will give SPL 92 dB @1W/1M, fairly efficient. The published specs for the HT080M0 give a high frequency limit of 18 KHz. I am guessing that the driver is 6 dB down at 18 KHz. If my guess is correct, a tweeter will be needed to provide the top end. My guess is to use a SPL 92 dB tweeter with a 1 micro Farad cap for 8 Ohms or a 1.5 micro Farad cap for 12 Ohms.

Ordinarily, I will not go any where near a piezo tweeter. However, for this application, a piezo tweeter just might be OK. A 1.5 micro Farad cap in series with and a 12 Ohm resistor in parallel with a CTS KSN1038A is what I came up with. The other tweeter scheme I came up with is the Audax TW025M0 soft dome (8 Ohm) with a 1 micro Farad cap as the crossover.

Please give me your feedback. I want to resolve this speaker issue quickly.

Eli D.

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Topic - "Efficient" Small Speakers - Eli Duttman 14:04:18 10/19/99 (20)

Working URL for EIFL - Eli Duttman 13:57:54 10/26/99 (0)

Check these out - ChristopherC 16:52:27 10/21/99 (0)

Re: "Efficient" Small Speakers - Thorsten 14:17:58 10/19/99 (17)

horror stories - klaus 01:52:39 10/20/99 (0)

Re: "Efficient" Small Speakers - Eli Duttman 15:42:09 10/19/99 (14)

Eli - Try building this..... - Thorsten 12:48:23 10/20/99 (8)

Re: Eli - Try building this..... - Jake 06:10:07 10/23/99 (2)

Re: Eli - Try building this..... - Thorsten 06:47:59 10/24/99 (1)

Thanks! (nt) - Jake 07:09:50 10/24/99 (0)

Re: Eli - Try building this..... - Eli Duttman 15:19:07 10/20/99 (3)

Re: Eli - Try building this..... - Thorsten 05:05:53 10/21/99 (2)

Re: Eli - Try building this..... - Jim Maher 12:55:49 10/21/99 (1)

Re: Eli - Try building this..... - Eli Duttman 13:41:23 10/21/99 (0)

Quest->will build this next Spring?! - Quest 13:48:12 10/20/99 (0)

Re: "Efficient" Small Speakers - Thorsten 04:20:59 10/20/99 (1)

Try the Tannoy Resolution Series - BillH 07:29:05 11/03/99 (0)

Electronic Crossover Information - Eli Duttman 15:53:27 10/19/99 (2)

How come I'm not suprised to find you guys here! - Eric Ventura AKA Lonely Raven 07:45:57 10/21/99 (1)

How are ya? Lonely Raven! - Quest 09:14:16 10/21/99 (0)

I've tried the 4" Pioneer car speaker - Quest 15:38:17 10/19/99 (0)

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