SynTripP: 2-way 2-part Virtual Single Point Source Horn

I notice quite a few folks here using Hypex NC252MP on the compression drivers chasing lower distortion amd noise. Id welcome opinions about whether any of the higher end diy TPA3255 modules could reasonably be substituted? They are pretty close to hypex in SINAD performance but a bit lower on power. In dual mono with a 48v 5A supply i think we can get close to 130w RMS per side into 8 ohms (fosi, 3E, Sylph etc) . That doesn't really give us much headroom though does it?
The Hypex NC252MP is voltage limited to 150Wrms @1%THD @1kHz at 8 ohms.
Hardly any headroom difference between 150 and 130w.
130w is close to the excursion limits of the HF driver at the low end of it's pass band- I'd probably peak limit to no more than that regardless of amplifier headroom.
 
  • Like
Reactions: rrobot
We use 2 MC502P Hypex amps for the tops, we have loved these since we upgraded, fantastic clarity and headroom and noise so low you have to almost be head-in-the-horn to hear any noise.

For DSP we are using the MiniDSP Flex HTX which way outperforms any pro gear we have looked at.

We are upgrading our compression drivers to the Eminence 314x carbon drivers, which have the best time domain behavior we’ve seen…
 
We are upgrading our compression drivers to the Eminence 314x carbon drivers, which have the best time domain behavior we’ve seen…
I'd love to hear these in a direct comparison to my Vitavox S2s.

I had JBL2435Bes before the S2s. Pretty darn good!

I seem to like 1.4" or 1.5" throat drivers over 1"!

Would also like to hear the miniDSP Flex 8 - one day!..
 
  • Like
Reactions: grec and rrobot
@Speedysteve7 the flex HTX is the one to get, it not only has DIRAC but it has 8 channels of both balanced and single ended inputs as well as outputs, and more digital input formats supported, it is really the ticket. The Flex 8 is way more limited and doesn't have all the balanced capabilities, if memory serves. And the HTx has incredible specs on the AD and DA...
Not seen that one before.
Looks impressive.
Would be great to find somewhere that could 'demo or home loan' 😂
In the UK like hen's teeth..

Great to see 'reasonably' priced evolving alternatives to what I have today.
 
Hey there

I'm currently planing on building my own pair of SynTripPs. I just experimented with different designs for the secondary horn as you can see in the rendering.

Are there any drawbacks in changing the design to this shape?

I want to cross them over at 120hz, so I thought about sealing the ports, what are the effects on the max SPL in this case?

Really looking forward to hear this beautys in person.
Greetings from Austria
Maxi

3.jpg
 

Attachments

  • 1.jpg
    1.jpg
    131 KB · Views: 49
  • Like
Reactions: Gill.T
Are there any drawbacks in changing the design to this shape?
Maxi,

Other than the way it looks, no.
I want to cross them over at 120hz, so I thought about sealing the ports, what are the effects on the max SPL in this case?
The -3dB loss from 350 to 475Hz and -10dB cancellation at 700Hz would be eliminated, so above 120 Hz, the effects are all positive, other than increased heat retention may increase "thermal compression".

Art
 
130w is close to the excursion limits of the HF driver at the low end of it's pass band- I'd probably peak limit to no more than that regardless of amplifier headroom.
Thanks for the confirmation Art, that's really helpful info. 🙂 Looking through this almighty thread, I'd generally seen people running amps with quite high maximum power on the compression driver but amplification up to 150W opens up some options from more "hifi" applications on the HF.

Hypex (or icepower) equipped commercially manufactured power amps don't appear that readily available though, especially here in Australia - it seems its either DIY, boutique manufacturers like NORD, Apollon, Audiophonics, Buckeye etc, or it's very expensive audiophile HiFi amps or finally Hypex plate amps which are very compelling if an akward shape when you don't intend to mount them in the cabinet. Am I missing any other options for Hypex grade noise and distortion performance ?
 
Last edited:
Haven't used the FIR because we use DIRAC, which actually works really well.
I've also used the MiniDSP products (Flex) and am pretty impressed in a home audio setting. I would say the software and UI (eg no access to the DSP from the front panel IIRC..only via USB) does seem more targeted at the hifi community than pro audio. None of that in any way precludes MiniDSP use in pro audio but the design and use philosophy is more from a hifi paradigm I suppose? Unless you use the separate DIRAC license like MrSpeakers there's lots of interaction with and reliance on REW which I found fine. They do indeed manage to hit some impressive figures for distortion and noise. I was doing some basic crossover linearisation using the modest FIR taps available in the MiniDSP flex - you need to use a FIR filter designer to build the convolution (eg rephase). I found it a nice product with good software, a very active community and strong development pipeline. The HTx looks impressive!
 
I've also used the MiniDSP products (Flex) and am pretty impressed in a home audio setting. I would say the software and UI (eg no access to the DSP from the front panel IIRC..only via USB) does seem more targeted at the hifi community than pro audio. None of that in any way precludes MiniDSP use in pro audio but the design and use philosophy is more from a hifi paradigm I suppose? Unless you use the separate DIRAC license like MrSpeakers there's lots of interaction with and reliance on REW which I found fine. They do indeed manage to hit some impressive figures for distortion and noise. I was doing some basic crossover linearisation using the modest FIR taps available in the MiniDSP flex - you need to use a FIR filter designer to build the convolution (eg rephase). I found it a nice product with good software, a very active community and strong development pipeline. The HTx looks impressive!
For sure, they orient toward consumer but if you're willing to use a laptop as the front end it kills any pro gear for performance.

FWIW we have the new Eminence 314x running and it is a major upgrade from Ti compression drivers. Much sweeter sounding and lacks the hard edge Ti drivers impart due to breakup modes.
 
Hi Art @weltersys

I'm about to order drivers for my Syntripps.

I planned to use 10CL51-8 and DE920TN-8. My local B&C supplier says that DE920TN is now end of life and unavailable, and suggests DE900TN as an alternative.

I had a look on the B&C website and the specs look the same, though the physical dimensions are a little different, and the frequency response graph is different in the upper end because the 900 appears to have a spike around 16kHz vs the 920.

What do you think? Can I use DE900TN in place of DE920TN?

DE920TN https://www.bcspeakers.com/en/products/hf-driver/archive/1.4/8/DE920TN

DE900TN https://www.bcspeakers.com/en/products/hf-driver/archive/1.4/8/DE900TN

Thank you.