Mark Fenlon's New CHP-70 (note the "P")

[markaudio]

Hi Bigjppop,

Here's Mixel, a dealer in Japan. They carry the CHP-70 driver:

MarkAudio CHP-70 10cm¥Ñ¥ë¥×¥³¡¼¥ó¥Õ¥ë¥ì¥ó¥¸¡Ê¥Ú¥¢¡Ë - Mixel Intenet Shopping

You can also look at:

http://www.fidelitatem-sound.com/

Thanks,

Mark.

 

[blueplanetacoustic]

Hi Markaudio Fans,
the CHP-70 is available in Europe now.
Ask your local dealer or order direct from our shop.
Dealers can register in order to receive dealer pricing.
Our version of CHP-70 has a black frame...
Cheers,
Nick

 

[Tyimo]

Hi Mark!

Don't you plan to make in the near future a 8 ohm version of this driver??
Like with the CHR-70.

greets.
Tyimo

 

[Scottmoose]

I suspect Mark is plotting something along these lines, but I wouldn't expect it in the short term. Medium term though perhaps. The existing unit is proving a bit of a hit, so I understand.

 

[Tyimo]

Thanks Scott!

 

[chrisb]

I suspect Mark is plotting something along these lines, but I wouldn't expect it in the short term. Medium term though perhaps. The existing unit is proving a bit of a hit, so I understand.

If you include the CSS branded EL70, that'd be a bit of an understatement, and Mark's resistance to rush re-engineering for the sake of that one number is understandable.

Of course, I just solve the issue by using 2 drivers per channel.

 

[Tyimo]

Of course, I just solve the issue by using 2 drivers per channel.

I would use also 2 drivers (8 ohm), but for the higher sensitivity.

 

[Scottmoose]

With series wiring SPLs will be unchanged over a single unit for a given input. You will get an extra 6db dynamic range though as individual excursion will be halved.

 

[planet10]

With series wiring SPLs will be unchanged over a single unit for a given input.

Only in the context of being driven by a pure voltage amplifier.

With a pure current amplifier you gain 6 dB, and with real amps you gain somewhere in between, With a typical SET or amp like the F2 you gain ~3 dB

dave

 

[Tyimo]

For my 10W PP amp every dB gain is important.
This is the reason why I planed to use 8Ohm parallel drivers.
I think I am not alone with this claim for 8Ohm driver

Tyimo

 

[planet10]

With a typical transformer coupled amplifier, it is the 2 drivers that is important, not whether in parallel or series (as long as you have it on the right taps.

dave

 

[Tyimo]

as long as you have it on the right taps.

Yes. But, I haven't got 8Ohm tap.... just 6 and 4.
But basically I understand your oppinion on the series connecting. Thanks!
Tyimo

 

[SunRa]

Hi all,

Would you put this driver in a uFonken style cabinet? Any advantages from a BR for this specific driver could occur?

 

[planet10]

The CHP should go into the same miniOnken boxes as the EL70, i haven't yet checked to see if any changes in the vent spacers would need to change... but i will do so.

dave

 

[SunRa]

Thanks for reply Dave, I wasn't aware a miniOnken design is available for EL70, I'll look for it.

 

[planet10]

The early version is published. The current plan-set costs money...I have just posted the boilerplate for these on the p10 forum

http://www.diyaudio.com/forums/plan...10-hifi-minionken-plan-set-subscriptions.html

I suppose that a beta phase for CHP versions would be called for.

dave

 

[crispow]

Markaudio in HK

Hi, Where can I buy drivers (and preferably hear them) in Hong Kong please? Phone number?
Does the Chai Wan address ("MarkImage") still operate? many thanks ,
crispow

 

[markaudio]

Hi, Where can I buy drivers (and preferably hear them) in Hong Kong please? Phone number?
Does the Chai Wan address ("MarkImage") still operate? many thanks ,
crispow

Hi C,
Use this link - see post N0. 3

http://www.diyaudio.com/forums/markaudio/194703-i-bought-pair-chr-7-g3.html

Thanks
Mark.

 

[st33n]

What would be a recommended box size for this speaker? I purchased two to build my own powered speaker (using a helder 2020). Any tips? This would be my first speaker project.

 

[planet10]

CHP-70 or CHP-70 gen2?

I've done a design for the 1st with 13litre, i don't think it would mind a bit more. The latter i settled on 9 litre as optimum.

dave