AmpsLab-Spk PRO DRIVERS Pyle PH810 horn + PRV Audio D280Ti

Pyle PH810 horn + PRV Audio D280Ti

Pyle PH810 horn + PRV Audio D280Ti post thumbnail image
Here is another horn that looks good with 8″~12″ woofers. The Pyle PH810 measures approximately 10″ W x 8″ H and has a coverage of 90° H x 40° V. Cut-off frequency is stipulated at 1kHz. It fits 1″ throat compression drivers with standard 1-3/8″ -18 screw threads. Made of ABS resin.
Finding the right compression driver

Fig 1 shows five compression drivers with the PH810. All measurements are RAW, ie without crossover and EQ. Plots are displaced for easy comparison.

Blue trace = Dayton D250P
Red trace = Selenium D220Ti
Black trace = PRV D280Ti
Green trace = Pyle PDS382
Violet trace = Pyle PDS221

Pyle PH810 horn + PRV Audio D280Ti RESPONSE

(Fig 1) No Smoothing, Mic at 1 meter tweeter axis, 5 msec gating

PRV D280Ti with Pyle PH810

From Fig 1, it seems that all the drivers can be used. I decided on the PRV D280Ti because it has the least peaks and valleys. My approach is always to avoid using EQ if possible.

The Black trace is Fig 2 is the RAW response. The Red trace is RAW but with the CDEQ on my electronic crossover activated. The Blue trace is at 2kHz with CDEQ.

Apart from a 2.5dB dip at 3.5kHz and 9kHz, the response is pretty flat up to 15kHz.

ph810_d280ti_raw_cdeq_2k_crop

(Fig 2) Pyle PH810 with PRV D280Ti

Incorrect Summing

Fig 3 is with the D280Ti/PH810 crossed to a Dayton RS180S woofer. Electronic crossover was set at 2kHz (24dB/oct) with CDEQ on.

The Red trace is the summed response. Due to the large acoustic centers offset, a notch was observed at 2kHz.

full_hp_lp_2k_24db_crop

(Fig 3)

PRV D280Ti Phase Inverted

Fig 4 is with the compression driver, D280TI, rewired for Inverted Phase.

Now, the notch shifted to the left.

full_hp_lp_2k_24db_rev_crop

(Fig 4)

Delay added to RS180S with PRV D280Ti Phase Inverted

Fig 5 is with delay added to the RS180S. The delay time is adjusted until a deep notch appears. This will be exactly at the acoustic crossover point (1.8kHz).

full_hp_lp_2k_24db_rev_ta_crop

(Fig 5)

Proper Summing through Time Alignment

Fig 6 shows the correct summing when the D280Ti is re-wired back to normal phase.

 

full_hp_lp_2k_24db_cdeq_ta_crop

(Fig 6)

 

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