Mark Audio CHR-70 Application Thread

[HareBrained]

Originally posted by type
I just noticed that these are on say for $55.00 a pair. The Alpair 10's are also on sale for $109 each, which seems like a good deal and they're spec'd to 40hz.

I just received my pair from alpair-usa.com. I spent the US$3 extra for Priority Mail and they crossed the USA in 3 days. Of course, I hooked them up in the box they came in and listened a little. Not bad unbroken-in and OB. Guess what I'll be doing this weekend...

[type]

Originally posted by HareBrained


I just received my pair from alpair-usa.com. I spent the US$3 extra for Priority Mail and they crossed the USA in 3 days. Of course, I hooked them up in the box they came in and listened a little. Not bad unbroken-in and OB. Guess what I'll be doing this weekend...

Which did you get the 70's or the 10's?

[HareBrained]

Originally posted by type



Which did you get the 70's or the 10's?

CHR70's. They came in gray although I'm pretty sure I ordered the copper. It doesn't really matter to me. Both colors are sharp.

The enclosure will be a dual chamber reflex that I mentioned above but I'm thinking of a little bigger, 9-10L. This will move the frequency of highest ripple down from 100Hz to in the 50's. I have only limited space on my desk, including vertically, so I need to work some numbers before I finalize the dimensions. I also have to see what BB-ply is available locally. I think I'm going to be able to use just one 4x2 handy panel, if available. I also need to pick up some port material (aka. plumbing pipes) and a properly sized hole saw. I'll try to remember to take pics.

[speakrsrfun]

Scott, Just wondering if you or Dave, and Dave you can answer this one also, have either of you thought of a BVR with two CHR-70’s per side?

I’ve done three test boxes some not optimal due to them being available already built at home but as it stands the ported alignment in a 15LTR cabinet tuned to 50Hz sounded stellar. Huge soundstage, detailed mids and highs and a bottom end that makes the FE127 sound lifeless. In room I’d say I got response down to the mid 30’s to low 40’s and with decent levels also. Figure it this way, with two a side they have much better transient attacks and a much more clean less fatigued or strained sound at higher volumes.

Sealed they sound amazing and with this alignment they seemed much more controlled but with the sacrifice of extension, they are 8LTR sealed and to be honest don’t remember where the roll-off is as this was merely a test. And my whole reason for this thread is to design a speaker that can stand on it’s own without the need for a dedicated sub in most reasonable sized rooms, true? Sealed out….

I also attempted a single sealed driver (8LTR) and a second CHR in a OB on top of the cabinet. These had a magical almost eerie air to them, but only worked well at lower volumes as I had a hard time controlling the open baffle CHR70 from over excursion at higher volumes. Properly Bi-amped and EQ’d to prevent the excursion issues it would be a great design, but alas also needed a sub.

So as it stands a ported design is where I’m headed and to me the best option if a BVR. Now without the knowledge or math required to figure out a BVR design on my own I ask the entering question and say Scott or Dave any ideas?

I’m very happy with the Mark Audio drivers and wouldn’t turn down a chance to try anything new they may offer. Well worth every cent these little guys cost, trust me you’ll be amazed, peace and happy listening.

[planet10]

Originally posted by speakrsrfun
Scott, Just wondering if you or Dave, and Dave you can answer this one also, have either of you thought of a BVR with two CHR-70’s per side?

Not yet. If we were to do one it would be 1 driver on the front, 1 on the side like Cal's Calhouns.

makes the FE127 sound lifeless

so does the FE127eN. Stock vrs stock i'd give the CHR the nod, but the low efficiency means you can't use the best amps.

dave

[Scottmoose]

Probably.

OTOH, like Dr Strangelove, I have a plan...

[italynstylion]

I just ordered 5 pairs of these for a simple surround system. I'm excited to get them in!

[ractis]

i just got a pair of CHR70s and proceeded to put them into a 7ltr front slot BR that i had previously used for the CSS FR125 .

after a couple hours of playing some bass heavy track for burn in, I took a listen and yup, they're truly very nice. Compared to the FR125, the CHR70s are louder, had more detail and better highs.

I like these and will choose them even if they have the same price as the CSS FR125.

[italynstylion]

Originally posted by ractis
i just got a pair of CHR70s and proceeded to put them into a 7ltr front slot BR that i had previously used for the CSS FR125 .

after a couple hours of playing some bass heavy track for burn in, I took a listen and yup, they're truly very nice. Compared to the FR125, the CHR70s are louder, had more detail and better highs.

I like these and will choose them even if they have the same price as the CSS FR125.

Nice! That makes me even more excited to try out the ones I ordered! What are those enclosures tuned to? Where do you think your low end starts to roll off?

[ractis]

the port's tuned to 55hz
there's definitely usable bass down to 40hz (in my smallish room)