Author Topic: DIY speakers or kit for a 10W valve amplifier  (Read 579 times)

Offline 1200GXman

DIY speakers or kit for a 10W valve amplifier
« on: January 29, 2019, 02:23:55 PM »
Where can I buy speakers that will work great for a 10W valve amplifier?
All the things these days are build for high output amplifiers.
Sansui AU-101, Sansui AU3900, Rotel RA935BX, Pioneer SA-6500 Mkii, Marantz PM53, DIY kit amplifier

Offline bbe22

Re: DIY speakers or kit for a 10W valve amplifier
« Reply #1 on: January 29, 2019, 02:48:13 PM »
You need speakers with a high sensitivity  , say 98dB / W  /output    These are easy to source but u need to look in the PA  / Pro sections rather than the usual Hifi  catalogs
this is an example and test to illustrate
https://www.audioxpress.com/article/Test-Bench-Acustica-Beyma-s-12CXA400Nd-12-Pro-Sound-Coaxial-Driver
another
https://faitalpro.com/en/products/Coaxial_Loudspeakers/product_details/datasheet.php?id=351050010
« Last Edit: January 29, 2019, 02:58:17 PM by bbe22 »


Offline bbe22

Re: DIY speakers or kit for a 10W valve amplifier
« Reply #3 on: January 29, 2019, 03:33:37 PM »
Visaton not suitable , after baffle step correction you'd be lucky to get 88dB ......... :(

Offline bbe22

Re: DIY speakers or kit for a 10W valve amplifier
« Reply #4 on: January 29, 2019, 08:56:38 PM »
Correction on the above and to explain.............
from the manufacturers datasheet

plus Xover / filter

results in

however  note

green   -   little to no bass response  will need a lot of help from box alignment
blue      -  poor treble
red       -  83dB  ave achieved   

 

Offline fdlsys

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Re: DIY speakers or kit for a 10W valve amplifier
« Reply #5 on: January 29, 2019, 09:05:52 PM »
Where can I buy speakers that will work great for a 10W valve amplifier?
All the things these days are build for high output amplifiers.
Visiting JHB any time soon? Bring your amp, I can demonstrate what it will do on DIY HE speakers.
The four building blocks of the universe are fire, water, gravel and vinyl. Dave Barry
Come back when youíve lived a little. Miles Davis

Offline Michon

Re: DIY speakers or kit for a 10W valve amplifier
« Reply #6 on: January 29, 2019, 09:07:23 PM »
I have a push pull EL84 amplifier which has an output capability of around 12W.

I have used it with satisfactory results with a pair of Tannoy Cheviot II speakers which have an efficiency around 93dB/1W.

Higher efficiency will not hurt, but depending on your room size, listening distance and desired dB SPL output efficiency in the lower 90s will be suitable too in my experience in a small room.

I've been thinking about selling my Tannoys, as I've been playing with a pair of Philips full range drivers (which too will meet your efficiency demands), but I see from your profile that you are in Bloemfontein and I am in Johannesburg.

I have bought a pair of Visaton B200 drivers from a member, but haven't received them yet. I wouldn't mind moving them on to you if they are what you are looking for. I also have a pair of high efficiency Dayton planar tweeters should you want to build a two way.
« Last Edit: January 29, 2019, 09:12:53 PM by Michon »
Plate, vakuum buis versterkers en breŽband oorvormers.

Offline bbe22

Re: DIY speakers or kit for a 10W valve amplifier
« Reply #7 on: January 30, 2019, 10:45:16 AM »

Offline Michon

Re: DIY speakers or kit for a 10W valve amplifier
« Reply #8 on: January 30, 2019, 11:28:29 AM »
Build a straight array with fifteen of these per side; https://www.thesoundguy.co.za/Pro-audio/Components/Woofers/FaitalPRO%204FE32%20Neo.
Plate, vakuum buis versterkers en breŽband oorvormers.

Offline Jacobus

Re: DIY speakers or kit for a 10W valve amplifier
« Reply #9 on: January 30, 2019, 11:37:07 AM »
Your other option is Eminence Beta 12LTA. Plenty of options on Google. Also available from The Sound Guy.

Offline bbe22

Re: DIY speakers or kit for a 10W valve amplifier
« Reply #10 on: January 30, 2019, 09:37:42 PM »
The FaitalPro small woofers certainly are over achievers and good value . I had a  good result with the 3 inch variant in my recent Unsquare 3 way build and expect the same from the 4 inch. They are however still only a mid range / full range and even in a line array will have no bass on their own.

For a design that certainly will work and probably with a very simple Xover (200-300Hz),  with drivers available locally,  at really modest cost I suggest the following 2 way     (should be circa 93 dB ave)  and be able to do 40Hz upward, ie true full range
mid / tweeter      the Faital   as Mich indicated
Bass   one of the Hybrid 15H  15  inch drivers , eg
https://www.soundselect.co.za/hybrid-15h300-15-loose-speaker
The  box will need a good size baffle to get close (in smooth response) to the Faital factory specs for eg

Caveat :  high efficiency bass needs volume , so the cabs will be substantial.


Online PsyCLown

Re: DIY speakers or kit for a 10W valve amplifier
« Reply #11 on: February 20, 2019, 07:53:30 AM »
I may be willing to sell my Philips drivers which are in my sig, will include the current enclosures.

They're around 95 db 1w / 1m. Drop me a PM if you're interested.
Amps: 4x 150W into 8ohm (LJM L15D)
DSP: MiniDSP NanoAVR HDA & UMIK
Speakers:DIY Full Range Phillips AD12202 & Speakerplan's X15 on loan
Sub: DIY 12" ported
Headphones: Beyerdynamic DT770 LE