Infinity Reference 6933i Speakers
Product Details
Manufacturer: Infinity
Distributor: Car Audio & Security
Website: link
Typical Selling price: (CAS) £49.99
An affordable three-way six by nine full range speaker with pole-mounted midband and tweeter assembly. The well-made grilles have an oval aperture into which fits this slightly tilted mid/high oval ‘˜pod’ once the grille has been fitted. This pod bears a switch upon it that is marked ‘˜0dB’ and ‘˜+3db’. This is of course an electrical figment as a speaker is a passive device. Rather, it means that the impedance and specification of the tweeter is a little bright to start with, in case you are mounting the product under a stock grille. (This is very unlikely in a UK car but the biggest, oval, 6933 speaker has this feature as part of the DNA of the series it is a part of – the Reference Series.) The 0dB avoids any ‘˜negative’ symbol being usedit’s all about more, not less that way. However, in older versions of this speaker, I found the ‘˜zero’ to actually be a resistor with a switch and the slightly lower level from switching this in line, came along with a nasty reduction in the whole performance of the tweeter. It lost all its edge as well as three decibels in level. Let’s go find out how well this one works
The ovals were hooked up with some more Infinities. A pair of Kappa 65.9cs components. These were connected to a Blaupunkt GTA4 Special Edition 2011 four channel amplifier, driven from the resident reference Pioneer P88RSII head unit.
But there was one really annoying issue.
The Infinity Reference 6933i 6×9 is not in fact a standard size and will require their own baffle and careful cut-out. Just as if they were a specialised product like the Kicker L7 square woofer, or the Vibe QRB69 which is ruddy rectangular! I have had nearly fifty different models of six by nine through these original Fusion Area 51 test boxes I have used for ever. And just a very few won’t fit. These 6933i Refs were one such and I had to get some boxes in from Bass Zone and take the Surform to them to get them to fit. They are just a bit too long versus standard.
However, if you are reading this, you may well forgive them their individuality as the speakers are a mere two Ohm impedance! This is rare as rocking horse poo and means you will be drawing more watts from most amps than all other single speakers are able to.
– Power Handling: 100W RMS/300W peak
– Impedance: 2 Ohms
– Passband: 46Hz to 30kHz
– Pressed Steel chassis, grilles supplied
– Sensitivity (1w/1m): 94dB
– Three-way, mid and HF on fixed angled pole mount
– HF has a ‘+3dB’ switch on front of speaker
– Available as ‘˜9633cf’ version without grilles or simply as ‘˜9633gr’ for grilles
– Mounting Depth:77mm
– Complete with speaker gasketing foam strip and screws and fixings but no wires
Thiele-Small Parameters
– BL Magnetic ‘˜shove in Tesla-metres): 4.30 T-m
– DCR: 2.30 Ohms
– Mms (Moving mass): 21.70g
– Sd (area of cone): 236.4cm sq
– Cms: 442µm/N
– Vas (volume air compliance equivalent): 34.69 Litres
– Fs (lowest frequency of cone assembly/suspension resonance): 51.4Hz
– Qes (‘˜electrical’ Q): 0.87
– Qms (‘˜mechanical’ Q: 6.34
– Qt (total Q): 0.77
Editor review : Infinity 6933i 6×9 Coaxial speaker
This rig was great fun and the very first thing I learned is that I may have made my reference headunit ill. It’s a very high end quality unit and it has been through the wars on my test rig. I am a bit fretty but I had to get my review done, so a trusty Sony SACD player came out. This is as rare as snake’s pyjamas and I have very few discs. But I also played some CD through the deck, via a single stereo RCA output (yes, just one!) on the back, with a brace of Y leads hooked up to feed a split stereo to front and rear channels of the Blaupunkt.
As I was struggling and making weird transport noises through the RCAs and so forth, before losing voltage at the switching lead and getting an amp that simply wouldn’t power up, the GTA Blau was showing protect status on its LED over and over before I gave up and plugged in the Sony. So help me, that amp was a patient soul and finally played its heart out once I had connected healthy things up to drive it all with.
And bloody hell are these just a six-by-nine amongst Ovals! For one, they have that insane half-the-normal-impedance-so-draw-twice-the-power schtick going on. I mean, whoever before heard of a TWO Ohm speaker? Bloody brilliant and entirely within the ability of the 2011 special edition Blaupunkt GTA amp. It loved it.
I played mad resolution SACD Pink Floyd with huge roaring bass lines and mad tinkly clock shop detail. I played some Eighties over-produced Trevor Horn pop by Frankie Goes To Hollywood and then, in an attack of ‘˜Bollocks!’ I slipped the Power Supply system killer bass CD in the slot.
And the crazy thing is, I found the limit of the power system in my rig and the could tell the amp was struggling to get enough current to do the absurd things I was asking of it, rather than hearing the speakers running out of ability to eat watts and poo bass. They were large and deep and authoritative of lows.
But I do find the as-sold super-bright voicing of the HF a bit wearing and yet the -3dB attenuated setting (labelled erroneously as ‘˜0dB’ on the product itself) a bit too smeared-off-by-a-bloody-resistor and dull.
So they are perfect for rear channel use in a car that just wants it loud and clear and isn’t pompous about front stereo, or brilliant in an in-car cinema multi-channel surround setting but those are rare outside of high end OEM car systems, oddly enough.
But the bass is stupendous. They can play bass CD material and drop with taut sexy control better even than a ten inch subwoofer. The quality of the bass from these two speakers in their Bass Zone boxes was ridiculous. Sweet, fast, front-edge equipped and exciting. It was even pretty damn rich and fat with actual visceral sensation as you were nearby.
You will feel the output of these in your body of you play them boxed in your car on an amplifier.
They look handsome as well but are not nearly as sparkly delicious sounding as the Infinity 69.5cs Kappa components I had in the rig at the same time. They are separately reviewed. But for here, the Infinity Reference 6933i 6×9 ovals score sufficient in all ways, especially for huge efficiency, top Value and big arsed power handling, to garner a coveted Talk Audio recommended flag.
Overall 8.6
Sound Quality 8
Build Quality 8
Power Handling 9
Efficiency 10
Value For Money 10