As alluded to in my other thread, I have ten pairs of brand-new-in-box Mark Audio (Markaudio) CHP-70 Gen.2 wideband drive units with the charcoal black paper cone up for sale. These are the same drivers as the CHP-70 Gen.2 drive units with the natural cone colour, differing only in the black / charcoal pigment added to the paper pulp.
For background interest, the CHP-70 Gen.2 was developed by Markaudio in conjunction with their Japanese distributor and a number of his jazz / small club playing and attending enthusiasts. They wanted to create a 4in wideband driver with a semi 'vintage tone' that captured some of the characteristics of classic wideband units, with a lightly shelved down top end and smooth / natural midrange tone. The original Gen.1 CHP leaned that way; the Gen.2 models introduced a raft of upgrades: an improved basket, a new central cap & fastening thereof, Japanese designed low-mass coil and a new spider design providing a 12% reduction in moving mass.
Main CHP-70 Gen. 2 features:
-Usual Markaudio shallow-profile cone for consistent off-axis response
-Reinforced self-damping polymer basket
-Long-throw suspension
-Well balanced Fs, Qt, Vas to suit different types of loads
-Black (charcoal colour) paper cone
-Supplied with factory gaskets and connecting hardware
I'm asking £30 per pair plus shipping (less than half normal retail)
All drivers are packaged in their original Markaudio boxes. I use sustainable FSC rated outer cardboard boxes fastened with heavy-duty packing tape. These are reinforced inside with recycled heavy-duty cardboard and packed with recycled brown / grey packing paper and high quality bubble-insulation.
Thanks as always for looking, and if you have any questions, please don't hesitate to ask.
FS Mark Audio (Markaudio) CHP-70 Gen.2 drive units (charcoal black cone)
- Scottmoose
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#1 FS Mark Audio (Markaudio) CHP-70 Gen.2 drive units (charcoal black cone)
'"That'll do," comes the cry of the perfectionist down the ages.' (James May The Reassembler)
Website www.wodendesign.com
Community sites www.frugal-horn.com & www.frugal-phile.com
Website www.wodendesign.com
Community sites www.frugal-horn.com & www.frugal-phile.com
- Scottmoose
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- Posts: 1802
- Joined: Sat Sep 08, 2007 11:03 am
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#2 Re: FS Mark Audio (Markaudio) CHP-70 Gen.2 drive units (charcoal black cone)
In terms of use, being functionally identical to the natural / parchment colour CHP-70 Gen.2, these are quite a flexible little unit, and as noted suit a range of enclosure types.
Frugel-horn Mk3 is a popular choice; our own Mr Topps has built several with the CHP (albeit with the parchment colour cone -same driver other than that as noted though). The Pensil CHP also works well & is nice & simple. They'll go happily in other horn & QW variations of course.
They go well in smaller bookshelf / standmount cabinets also: as noted on the other thread, for vented boxes, 6 litres tuned to 65Hz gives a nicely usable, lightly damped response. If a little more size is available, 8 litres to 55Hz also works well; very good for a 4in driver. Butterworth sealed is approximately 5 litres. Dave has his marKen resistive vent designs also which work nicely; one is shown below. The driver also works well as a compact midbass; Colin and I used it for the Jenna's (one build shown below), and if you want to simply give it a bit of HF 'sparkle', an inexpensive planar or dome can be brought in at a higher frequency. In the 'States the HiVi RT1C-A is popular; sadly it's tricky to get hold of here in the UK, but the Monacor RBT-95 series are a decent alternative.
Frugel-horn Mk3 is a popular choice; our own Mr Topps has built several with the CHP (albeit with the parchment colour cone -same driver other than that as noted though). The Pensil CHP also works well & is nice & simple. They'll go happily in other horn & QW variations of course.
They go well in smaller bookshelf / standmount cabinets also: as noted on the other thread, for vented boxes, 6 litres tuned to 65Hz gives a nicely usable, lightly damped response. If a little more size is available, 8 litres to 55Hz also works well; very good for a 4in driver. Butterworth sealed is approximately 5 litres. Dave has his marKen resistive vent designs also which work nicely; one is shown below. The driver also works well as a compact midbass; Colin and I used it for the Jenna's (one build shown below), and if you want to simply give it a bit of HF 'sparkle', an inexpensive planar or dome can be brought in at a higher frequency. In the 'States the HiVi RT1C-A is popular; sadly it's tricky to get hold of here in the UK, but the Monacor RBT-95 series are a decent alternative.
'"That'll do," comes the cry of the perfectionist down the ages.' (James May The Reassembler)
Website www.wodendesign.com
Community sites www.frugal-horn.com & www.frugal-phile.com
Website www.wodendesign.com
Community sites www.frugal-horn.com & www.frugal-phile.com