Loudspeakers & Amps

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The Importance of Time Alignment

Time alignment is often overlooked in loudspeakers. But what is “Time Alignment”, you may ask. The majority of loudspeakers consist of multiple drivers to cover as much of the audio… Read more >

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http://ampslab.com/blog/2016/10/23/the-importance-of-time-alignment/
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Osprey II – Eminence Beta 10CX

Osprey II It was in 2013 that I first worked on this coaxial. At that time, my intention was to have an idea of what the characteristics of the 10CX… Read more >

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http://ampslab.com/blog/2016/09/07/beta-10cx/
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Crown XLS-202 Poweramp Repair

When this amp came to me, the complaint was no lights, no fans when switched on. So I did precisely that and nothing happens. Normally, this indicates a blown fuse…. Read more >

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Merlin-II (Active Time-Aligned Dual Chamber Reflex)

It was as far back as 2010 that I presented the Merlin. The Merlin is an interesting design in that it is a DCR (a Dual Chamber Reflex). Internally, there… Read more >

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http://ampslab.com/blog/2016/12/12/merlin-ii-active-dual-chamber-reflex/
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(Pt-5) Pyle PH565 + Pyle PDS182

Pyle PDS182 compression driver In this fifth and final installment, I took one of my budget compression driver, a Pyle PDS182, and screwed it onto the PH565. I was determined… Read more >

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http://ampslab.com/blog/2016/12/06/pylepro-ph565-pyle-pds182/
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(Pt-4) Pyle PH565 + Peavey RX14

While the PRV D280Ti compression driver works well with the PH565 horn, I am still not completely satisfied with the flatness of the response. This time, I screwed on a… Read more >

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http://ampslab.com/blog/2016/12/03/pt-4-pylepro-ph565-peavey-rx14/
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(Pt-3) Pyle PH565 + PRV D280Ti

Having tested out two compression drivers with this PH565 horn, I’m still not too happy with the results. In this third attempt, I decided on the PRV D280Ti. Fig 1… Read more >

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http://ampslab.com/blog/2016/12/02/pt-3-pylepro-ph565-prv-d280ti/
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(Pt-2) Pyle PH565 horn + Dayton D250P

In this 2nd installment, I was curious as to how a Dayton D250P compression driver would behave with the Pyle PH565. Fig 1 shows the frequency response of the D250P/PH565… Read more >

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http://ampslab.com/blog/2016/12/01/pt-2-pylepro-ph565-dayton-d250p/
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(Pt-1) Pyle PH565 horn + Selenium D220Ti

The Pyle PH565 horn measures 7-5/8″W x 6-1/8″H, making it an ideal candidate for 8″ woofer. It has a coverage of 90°H x 40°V, a cut-off frequency of 1kHz, 1-3/8″-18… Read more >

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http://ampslab.com/blog/2016/11/30/pylepro-ph565-horn-selenium-d220ti/
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(Pt-2) FaitalPRO STH100 horn + Radian 450PB

Radian 450PB with STH100 horn In Pt-1, I tested the FaitalPRO STH100 with the Selenium D220Ti. In this next test, I’ve been waiting to see how well my favorite compression… Read more >

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http://ampslab.com/blog/2016/11/27/pt-2-faitalpro-sth100-horn-radian-450pb/
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(Pt-3) Selenium HC23-25 horn + Dayton D250P

Dayton D250P Polyimide compression driver Compared to the Pyle PDB512 and the Selenium 220Ti, the Dayton D250P has the flattest response with the HC23-25 horn (Fig 1). BLACK trace =… Read more >

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http://ampslab.com/blog/2016/11/23/pt-3-selenium-hc23-25-horn-dayton-d250p/
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(Pt-2) Selenium HC23-25 horn + Selenium D220Ti

Initially, a budget Pyle PDB512 compression driver was mated to the HC23-25. While it’s perfectly fine for PA vocal use, the bandwidth is rather limited for hi-fi. In this second… Read more >

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