MarkAudio CHR-90 Gold 5" Full Range

MarkAudio CHR-90 Gold 5" Metal Cone Full Range- 151 mm- 8 ohm

The CHR is an affordable all-new Full-Range multi-purpose drive unit suitable for use in variety of medium size loudspeakers applications, or as part of a multiway system. For single full-range point-source purist applications, the CHR90 is highly capable.

Most Markaudio drivers have a purpose designed frequency lift in the lower ranges (typically 100Hz to 500Hz) to compensate for baffle step losses. The CHR90 is useful to these applications where end-users and loudspeaker makers need a wider choice on frequency cross-over point selection.

The CHR90 chassis is an all-new design, dedicated to this driver. All moving parts (powertrain) are new and custom made for this driver. Much work has been done to make the CHR90 a versatile driver and extend the well-known performance characteristics of Markaudio’s products.

Outer Diameter: 151 mm (5.95")
Mounting hole to mounting hole: 139 mm
Cone diameter: 90 mm 
Solder Tab: 0.25" or 6mm (quick connects)

Fun linear quadrupole cabinet design here!

MarkAudio CHR-90 Enclosure Plans

• Centre-channel has two forward-facing slot-vents; alignment is quite well damped.
• Sealed standmount is a Butterworth (lowest possible flat tuning) alignment, assuming a voltage-source amplifier and normal connection & wire resistance. It won't get very low, but should do a decent job in smaller spaces, or as a satellite / surround speakers.
• Sealed floorstander is a Bessel (maximally flat group delay) alignment, assuming a voltage-source amplifier & normal connection & wire resistance. This one is designed to be used close to a wall or in corners; the Bessel alignment is well-damped so it suits being used near walls.

F Zero is 44Hz, VAS is +26 Litres and SPL 89.4 dB. Useable frequency range (depending on box design) is from 37Hz to 28KHz rated at +86dB. The frequency response curve is near flat, making the CHR90 ideal for purist applications. The central mid-range is benign, near flat response, from 1KHz to 6KHz giving end-users and custom builders the potential to use the CHR90 as a mid-field driver in larger multiway applications, useful for balancing out larger radiated surface outputs from big bass units. The CHR90 also has potential for use in 2 way applications as a bass-mid driver.