FWIW, I listened to one of these Peerless in a small 12 x 18 open baffle and didn't like what came off the back. There was alot of weird lower mid weirdness from the sides. I dont think this driver is a good OB candidate based on this. A single driver may work out somewhat, but not several running the full bandwidth.
You can make a very nice controlled dispersion cardioid speaker. 400x150x150 mm enclosure, 25 mm roundover, 2 woofers on each side, MTM front with 25x80 mm planar tweeter. I slapped a design together in some 40 minutes, so it is not fully refined and may have small errors. All transfer functions are achievable by active or passive crossover, no DSP required.
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Now that's what I'm talking about. Very nice and promising. I'll need to look at that more closely. May be a little on the larger side of what i intended to do - I have alot of bigger projects taking up space so it may have to fly under the radar of the wife.
We also use the Silver Flute W14. The smaller Peerless needs a bigger box.
The 2 on front + top, - 2 on each side preety deals with BS.
dave
:^)
As i typed i wondered if he question ref the meaning of the TLA would arise.
The drivers on 3 sides is sort of like these on MAX (the one with the driver on the top):
Went looking for more details of the 839870 ML-TL, i will give you this gratis (it does have proprietary info in it)m ibcrease the cross-section bt 50%, add a pair of woofers to the front and swap in a tweeter wher ethe FR sits.
dave
As i typed i wondered if he question ref the meaning of the TLA would arise.
The drivers on 3 sides is sort of like these on MAX (the one with the driver on the top):
Went looking for more details of the 839870 ML-TL, i will give you this gratis (it does have proprietary info in it)m ibcrease the cross-section bt 50%, add a pair of woofers to the front and swap in a tweeter wher ethe FR sits.
dave
Dave, I appreciate the input and sharing your design. I clearly have a few options to ponder with the ideas I've gotten so far.
@VoxCelestial What type of planar tweeter do you propose? I have some Hivi RT2s around here but their pretty big and don't allow close spacing.
A SS D7608-9200 would allow for a much lower xover for easier driver spacing options. You'd need a compact tweeter just off center.
Someone should design 2 ring radiators in a coax arrangement, sort of like two XT25s one inside another.
Someone should design 2 ring radiators in a coax arrangement, sort of like two XT25s one inside another.
I didn't have a specific driver in mind; I was about to propose Viawave ribbon, however, it's absurdly expensive in the US with dubious availability. BZ CQ76 is another great candidate at ~$130+shipping. Erin has measured one of them in Selah Audio Purezza (take note of baffle diffraction; tweeter itself is more linear): https://www.erinsaudiocorner.com/loudspeakers/selah_audio_purezza/
You also have GR ribbons there, which are smaller, but could work.
I had a moment and simulated the HiVi variant. Radiating surface is about 20x145 mm, woofers spread by 250 mm, everything still fits on the same 150x400 mm baffle. Tweaked crossover shows even better horizontal directivity, achieving really constant beamwidth of 90 degrees (-6 dB; contour line step 3 dB) from 20 to 6500 Hz. 20-50 region is dipolar, but 6x4" probably won't be used that low. Vertical directivity transition is more abrupt and HF vertical directivity may be too narrow, but that's an intrinsic property of long planars. Transition can possibly be smoothed by squeezing woofers and planar closely.
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Someone gave me used point source FR that got my interest because I also have 6.5 vifas. One of the popular models that I forgot the # to 👌. Psb used them in silver line.we use them for helper woofers, but they reach up quite a ways.
Heven’t put the drivers back into these.
dave
Op, 2 active towers 2x peerless per. Is what came to mind. You just need a couple good tweeters, and of course cabs.
Or 2 1/2 ways + center, joining with passive xover kits.
I was just browsing some old Hobby Hifi magazines, and I just came across these Peerless woofers.
Their distortion performance seems to be very good.
If interested I can look it up again and share the numbers.
I would just keep it simple, either go for an active cardioid or just some (M)MTM(M) system or something.
These small drivers are never really good for low end, so I always would use a (multi) sub
They were widely used in Philips surround sets back in the day (forgot the model type)
edit: found it.
Seems to perform even better than a Scan Speak 12MU, Seas and others, tested in the same magazine (HH 6/2009).
Even better than a lot of 5 inch woofers, although you will be SPL limited. Distortion also probably will rise up quickly after 90dB.
Their distortion performance seems to be very good.
If interested I can look it up again and share the numbers.
I would just keep it simple, either go for an active cardioid or just some (M)MTM(M) system or something.
These small drivers are never really good for low end, so I always would use a (multi) sub
They were widely used in Philips surround sets back in the day (forgot the model type)
edit: found it.
Seems to perform even better than a Scan Speak 12MU, Seas and others, tested in the same magazine (HH 6/2009).
Even better than a lot of 5 inch woofers, although you will be SPL limited. Distortion also probably will rise up quickly after 90dB.
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You could do a 6 driver SLOB array. I did a 6 driver array with six cheap poly cone 6.5in drivers, recently switched to 8. But 6 sounded darn good. I can only imagine using quality drivers would take this to the next level. Great sounding low distortion bass with chest punch.
https://www.diyaudio.com/community/threads/the-xsd-speaker.385717/
https://www.diyaudio.com/community/threads/the-xsd-speaker.385717/
@xrk971 - yes, a smaller slob would be amazing, but limited in low end spl capability. I bet the midbass punch would be a thing to behold if coupled with a good sub.
I'm aware these drivers are very good in terms of distortion characteristics. They're used in some older designs which have received some impressive accolades. The midrange clarity from these little things is pretty nice. Even just used full range, they have the right sound for a high crossover point and don't show practically any signs of breakup. A cast basket driver for $30 isn't common, along with shorting rings.
I like the idea of a small array as well as a cardioid setup. On a large surfaced baffle on a flat, wall mounted enclosure, a circular array with a large tweeter for low crossover point could be a nice thing. Something like a TW034 in WG looks to easily be doable given the tweeter would cope. Does anyone know what the array gain would be for 6 of these drivers in a tight circle?
I'm aware these drivers are very good in terms of distortion characteristics. They're used in some older designs which have received some impressive accolades. The midrange clarity from these little things is pretty nice. Even just used full range, they have the right sound for a high crossover point and don't show practically any signs of breakup. A cast basket driver for $30 isn't common, along with shorting rings.
I like the idea of a small array as well as a cardioid setup. On a large surfaced baffle on a flat, wall mounted enclosure, a circular array with a large tweeter for low crossover point could be a nice thing. Something like a TW034 in WG looks to easily be doable given the tweeter would cope. Does anyone know what the array gain would be for 6 of these drivers in a tight circle?