The Polk LSiM 707 belongs to a premium series by Polk Audio, it is a midrange floor-standing speaker with outstanding performance for the money. A handsome-looking speaker I might add, with the sleek curves and modern color tones, it is quite an absolute stunner. If you are planning to get an amplifier to power your Polk LSiM 707 speakers then look no further and please continue to read on.
There are plenty of amplifiers to go for but the question is which are the matching ones that will complement and really drive your Polk LSiM 707 loudspeakers. In order to find the matching amps, we will first learn more about these speakers, such as their sound characteristics, and have a firmer understanding of their strengths. Once we have this information, we will then introduce to you the best amplifiers to pair with the Polk LSiM 707 floor-standing speakers.
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Sound Characteristics and Strengths of Polk Audio LSiM 707
At first glance, the Polk LSiM 707 looks more elegant than powerful but as we check out the wide array of driver units, we start to notice its potential sonic prowess. Right at the top, you will see a 3.25″ (8.26cm) Super Cell Aerated Polypropylene Midrange driver, and right underneath it, a 1″ (2.54cm) Enhanced Ring Radiator tweeter in close proximity. In the mid-section of the speaker cabinet, a 6.5″ (16.51cm) Super Cell Aerated Polypropylene Mid/Woofer driver and followed by two 6″ H x 9″ W (Oval) Cassini oval, Super Cell Aerated Polypropylene subwoofers. The dual PowerPort bass venting is down-firing onto the speaker base, giving it a uniform and fixed surface instead of the wide variety of surface areas in a typical listening room.
The drive units aren’t just for show as the Polk LSiM 707 are capable of producing a total frequency response of 20Hz to 40kHz which is really impressive. In order to hit such extreme frequency extension, these speakers will certainly require a lot of power, and the recommended amplifier power of 20-300 Watts does indicate that. The speaker sensitivity of 88dB is rather low and this is another indication that the Polk LSiM 707 speakers need high-powered amplifiers to drive them. The nominal impedance is 8 Ohms and goes down to about 2.8 Ohms which also further reinforces the difficulty to drive these speakers. If we look at the frequency response with -3dB limits, the range is significantly shrunk to 38Hz-30kHz which means they might need powered subs to supplement bass under 40Hz.
More Details at Amazon – Polk Audio LSiM 707
The Polk Audio LSiM 707 are amazing speakers for stereo music, the imaging is accurate and highly defined, able to precisely placed each musician onto a huge soundstage that is wide and deep. There are plenty of details to boot as well, as it fills up the vast soundstage providing us with an incredible music presentation of our favorite tunes. The highs are crisp and with clarity, but when driven at loud volumes can be rather fatiguing. The clarity of the midrange provides plenty of details and matches well with the highs, giving us transparent and natural vocals.
The low frequency is powerful and taut, with full-bodied bass which digs deep into the bass extension. The bass blends in seamlessly with the rest of the frequency and provides that musical presence. Polk LSiM 707 does produce deep bass but not as prominent as a high-quality powered subwoofer can do. The overall bass reproduction has authority and has that punch that will vibrate the floor and furniture. Along with the clarity of the treble, their liveliness and the punchy bass production do make the Polk LSiM 707 ideal front main channel speakers in a home theater setup.
For a floor-standing speaker, the LSiM 707 is rather slim and can fit nicely into a large listening room. Unlike speakers with rear-firing bass ports, the Polk Audio LSiM 707 can be positioned slightly nearer to the rear walls. It is a pair of floor-standing speakers which will perform magnificently in both a stereo sound system and home theater system setup. The clarity and lively delivery of the treble, not to mention, the powerful bass will be able to provide an exciting home movie experience. It is best to avoid pairing these speakers with overly bright sounding amplifiers as it may cause listener fatigue. We should look at amps with high power outputs and having a dedicated subwoofer output will be optional. Without further ado, let us share with you the best amplifiers to match your Polk LSiM 707.
Polk LSiM 707 Specifications
- Speaker Type: Vented (Down-Firing Dual PowerPort Bass Venting)
- Drive Units: 1″ (2.54cm) Enhanced Ring Radiator tweeter, 3.25″ (8.26cm) Super Cell Aerated Polypropylene Midrange driver, 6.5″ (16.51cm) Super Cell Aerated Polypropylene Mid/Woofer driver, two 6″ H x 9″ W (Oval) Cassini oval, Super Cell Aerated Polypropylene subwoofers
- Total Frequency Response: 20Hz-40kHz
- Frequency Response (-3dB): 38Hz-30kHz
- Recommended Amplifier Power: 20-300 Watts
- Nominal Impedance: 8 Ohms (min. 2.8 Ohms)
- Sensitivity (2.83V/1m): 88dB
- Dimensions (H x W x D): 1291mm x 241mm x 468mm | 50.8″ x 9.5″ x 18.4″
- Weight: 45kg (99lbs)
Best Amplifiers to match with Polk LSiM 707
Peachtree Audio Nova300 will be one of the best amplifiers to match with your Polk LSiM 707 and based on its price point, definitely the most worth it. The power output of this integrated amplifier is 300 Watts per channel into 8 Ohms, more than enough to drive the difficult LSiM 707 speakers and really push their subwoofers to overdrive. The warm quality of the Peachtree Audio Nova300 is not only musical sounding but also matches well with the bright sounding Polk LSiM 707 speakers, as it does make them sound overly bright. Then there are a plethora of features to boot.
More Details at Amazon – Peachtree Audio Nova300 Integrated Amplifier with DAC
The Parasound Halo Hint 6 integrated amplifier matches really well with the Polk LSiM 707 speakers as it has both the power output and current to drive them. The design of the amplification is by the legendary John Curl and so you can be assured that this high bias class A/AB operation and an oversized shielded toroid power transformer are capable of providing you with clean and ultra-low distortion sound quality. The musicality of the Parasound Halo Hint 6 delivers a dynamic and powerful sound presentation of your favorite music with a warmth that is pleasing to the ears. Go and have a listen to hear the beautiful sound.
More Information at Amazon – Parasound HINT 6 Halo
In order to really drive the Polk LSiM 707 speakers, going for a preamp and power amp combo would be ideal, as these speakers are rather power-hungry. You can go this route without breaking the bank, by choosing Wyred 4 Sound high-performance amplifiers which are really worth every cent. For the preamplifier section, you can go with the Wyred 4 Sound mPRE that comes with a built-in DAC. Another notable feature will be the HT bypass, enabling you to connect to your AV receiver. For the power amp, go for Wyred 4 Sound mAMP Mono-Block amplifier for your LSiM speaker. You now have a speaker system that can really push your loudspeakers and have impeccable sound quality without sounding harsh when played at high volumes.
More Details at Amazon – Wyred 4 Sound mPRE
If budget allows, you can go slightly higher-end by going with Parasound high bias class A/AB amplification instead of Wyred 4 Sound Class D amplifier (ICEPower). As mentioned, the Parasound amplifiers are well suited for your Polk LSiM 707 speakers due to their warm-sounding nature and it doesn’t add brightness to the overall sound quality. Their sonic performances are also class-leading in their price range. For the preamplifier, you can go with Halo P 6 which is a 2.1 preamp with a very powerful built-in DAC (384kHz/32-bit). The power amplifier section will be their Halo series A 21+. We will highly recommend having an audition with them along with your speakers.
For home theater setup, the Marantz SR8015 is probably the best AV receiver to go for due to its house sound and focus on great music playback. The Marantz house sounds are warm and musical sounding, which provides more balance and wider dynamics, without causing listener fatigue. A well-matched AVR to your Polk LSiM 707 speakers which can be overly bright when driven at high volumes. Marantz SR8015 is one of the most powerful AV receivers currently on the market but we will still advise connecting 1 or 2 powered subwoofers so to take some of the loads off especially you are driving multiple speakers (surround, height speakers, etc.). SR8015 is capable of processing 8K UHD sources as well, it is one of the must-haves for AV receivers.
More Info at Amazon – Marantz SR8015 11.2 Channel AV Receiver
You can also add power amplifiers into your home theater system, check out Emotiva power amplifiers, it ranges from Mono-Block all the way to seven-channels power amps. They use Class AB amplification which is great for music. For subwoofers, in order to keep up with the Polk LSiM 707 speakers, we will suggest going for high-quality subs from SVS. Most likely you will be using them in a large listening room, we will suggest SVS PB-3000 ported subwoofer for movie listens and SVS SB-3000 sealed subwoofer for music. Sealed subwoofers can still be great for movies though.
More Details at Amazon – SVS PB-3000 Subwoofer 13-inch Driver 2,500W Peak Power
More Details at Amazon – SVS SB-3000 Subwoofer 13-inch Driver 2,500W Peak Power
To Sum It Up
Tube preamps may be another ideal choice but if a warm sounding system is not your cup of tea. You can check out other brands which have more lively sound quality such as Rega, Onkyo, Cambridge Audio, etc. It is best to audition them first before making a decision. The more you listen, the more of an idea of what you really want for the sound quality. If possible, best to audition these amplifiers at your own listening room along with your speakers, and if any, together with your subwoofers too.
