Grant Fidelity SPT-100 Super Tweeter Evaluation

Audio Equipment used for all tests:
Power Conditioner - Adcom ACE-615
SACD - Marantz DV9500
Preamp - Outlaw 950 (bypass mode, no digital conversion)
Amp - Adcom GFA-555II
Speakers - ConceptTwo's
Sub Woofer - Athena SCT P3

Test 1 - First impressions 14-Nov-09:

Not all that bad looking on top of my speakers.


I connected the SPT-100's to my system prior to listening to any music, with the sensitivity set to 92 dB, and crossover set to 12Khz.

For the first listening test I set all three feet to the bottom, and placed the SPT-100's on top of each speaker as close to the front as possible to align with the drivers in my speakers. I sat back, and listened (SACD - Pink Floyd - The dark Side of the Moon). Very impressive, the high frequency's seemed clear, crisp, and precise, but no difference in the soundstage, or bass. I particularly listed to the chimes, and clocks on track 4 (Time), and tried to place that clear, crisp sound in my mind. I then turned all equipment off, disconnected the SPT-100's, and restarted.

I listened to the same tracks at the same volume levels. I could not hear any definite change in the sound, it was still clear, crisp, and precise as when the SPT-100's were connected.

I did some further adjustments, tried various combinations, and found the best response from the SPT-100's were at the sensitivity of 92 dB, and 15Khz crossover, but with the back foot raising the unit to be on the same plane as my speakers, and as close to the front of the speakers as possible.

I listened through the week to different music (CD, SACD, AM, FM,) with the SPT-100's either connected or disconnected most of the time it was difficult, if not impossible to tell whether they were connected or not, so I thought.

Below is a list of some of the music that was compared in the same fashion:
SACD
Boston - Boston
Diana Krall - The Girl in the other Room
Bon Jovi - This Left Feels Right
Steely Dan - Gaucho
The Police - Every Breath You Take
Stevie Ray Vaughn - Texas Flood
David Sanchez - Coral
CD
ELO - Secret Messages
Queen - A day at the Races
Van Halen - 5150
Bare Naked ladies - Gordon
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