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A horn I’ve always wanted to measure is a vintage Peavey CH-2. This is a big horn, measuring 19″ across and 10″ high. She was used in the SP2 and SP3 in the 80s. Her recommended minimum crossover is 800Hz at 12dB/oct. If I am using their RX14 compression driver, I would cross at about 2.2kHz. The RX14 will have no issues at that frequency.
Fig 1 is the RAW response of the CH-2 with a Peavey RX14. No crossover is used. The plot looks very similar to the CH-3. The beamwidth is however slightly improved. The horizontal dispersion is still 90° but the vertical is now 45° instead of 40° as in the CH-3. Whether this 5° extra is worth the increased size is left to readers. What comes to mind immediately is to house this CH-2 horn in a separate enclosure. It’s more manageable that way. The mid-bass can be handled by my THOR12400. This woofer is able to extend up to 2.2kHz as seen in the THOR-JBL. Another way is in a 3-way. Use a 10″ for mid-bass and a 15″ bass bin/subwoofer to handle the bass. Somewhat like in Peavey’s Project Two minus the horn loading for the mids and lows. That will sound wonderful in outdoor events. Something to think about for the future. Unless otherwise stated, all measurements were made in Full Space (4 pi) with the mic at 36 ins, tweeter axis. Impulse Window=5ms. No smoothing applied. |
November 12, 2024Drivers Evaluation, PRO DRIVERS
Fig 1 – Peavey CH-2 with Peavey RX14 • RAW Frequency Response