In this review, we will be comparing Heresy IV and RP-6000F, two Passive Floor-standing speakers by Klipsch Let's have a brief look at the main features of Klipsch Heresy IV and Klipsch RP-6000F first before getting into our more detailed comparison.
In the following sections, we will get into more detail in order to better understand how the Klipsch Heresy IV and Klipsch RP-6000F compare and hopefully end up with enough arguments to decide which one of these loudspeakers is the better choice for you.
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Drivers
One of the fundamental differences between these two speakers is that Heresy IV is a 3-way design whereas the RP-6000F is a 2-way speaker. 3-way designs utilize a midrange driver in addition to the tweeter and woofer on 2-way designs. Designing a crossover for a 3-way speaker is a complicated process and generally increases the overall cost of the speaker. Heresy IV features a 1" titanium-diaphragm compression horn-loaded Tweeter , a 1.75" Midrange and 1 x 12" Fiber-composite Woofer . On the other hand, the RP-6000F features a 1" Tractrix Horn Tweeter and 2 x 6.5" Cerametallic Woofer .
Frequency Response
Heresy IV has a frequency range of 48-20k Hz whereas RP-6000F has a frequency range of 34-25k Hz. With a minimum frequency of 34Hz, the RP-6000F can go significantly deeper on the low side and provide stronger bass compared to the Heresy IV's min frequency of 48Hz.
Below graphs depict how these two speakers compare with the max, min and average values of the Min and Max Frequencies of other speakers in the Floor-standing class in our database.
Low Frequency
Floor-standing Speakers
Heresy IV
RP-6000F
Min
Average
Max
High Frequency
Floor-standing Speakers
Klipsch Heresy IV
Klipsch RP-6000F
Min
Average
Max
None of these speakers achieves full range experience which is commonly agreed as 20Hz-20kHz. In order to achieve lower lows / deeper bass, we recommend you pair these with a subwoofer. Visit our Powered Subwoofers section to find out more about the available options.
Impedance and Sensitivity
Heresy IV and RP-6000F have the same Impedance of 8 ohms but where they differ is the sensitivity levels. Heresy IV sensitivity is rated at 99 dB and the RP-6000F's is at 97 dB. This 2 dB difference makes the Klipsch Heresy IV a more sensitive speaker compared to Klipsch RP-6000F, hence will play louder with the same amount of watts.
Sensitivity
Floor-standing Speakers
Heresy IV
RP-6000F
Min
Average
Max
Power Range
Power range is the range of input power in watts RMS that a loudspeaker is designed to handle. While using an amplifier within this range ensures the nominal performance , inputting a power that is higher than the max wattage can result in a damaged speaker.
Heresy IV can handle a max power of 125 watts RMS from the amp the whereas Heresy IV has a max power handling value of 100 watts RMS , 25 watts less than the RP-6000F.
Keep in mind that a higher max power handling value doesn't necessarily make that a louder speaker compared to a lower max handling speaker. Loudness or the sound level is also impacted by parameters such as Impedance, sensitivity and system efficiencies.
Input Type and Bi-Amping / Bi-Wiring
Both Heresy IV and RP-6000F features dual binding post speaker terminals for bi-amping or bi-wiring.
Physical Specs
Size of a speaker can sometimes become an important decision factor due to space constraints or in some cases purely for esthetic reasons. In this section, we are going to compare Klipsch Heresy IV's and Klipsch RP-6000F's external dimensions. Klipsch Heresy IV has external dimensions of 631.0 x 394.0 x 337.0mm ( 24-13/16 x 15-1/2 x 13-1/4inch) whereas Klipsch RP-6000F has external dimensions of 1010.0 x 237.0 x 432.0mm ( 39-3/4 x 9-5/16 x 17inch) .
Klipsch Heresy IV is 379mm shorter and 95mm less deeper than Klipsch RP-6000F but it is also 157mm wider.
Below you can see the front view size comparison of Klipsch Heresy IV and Klipsch RP-6000F in scale.
Base Surface Area Comparison
Base surface area of a loudspeaker may become a determining factor when the space in your room or desk is limited. The base surface area of the Klipsch Heresy IV is approximately 1327.8cm2 / 205.8inch2 and base area of the Klipsch RP-6000F is approximately 1023.8cm2 / 158.7inch2. The Heresy IV requires 30% more surface area than the RP-6000F which gives it a small disadvantage on placement in tight spaces.
Weight Comparison
The weight of a loudspeaker can become an important factor if you need to move and reposition the unit often. Weight of a speaker can also "sometimes" be an indicator of the rigidity of the enclosure and the quality of the internal components used. The Klipsch Heresy IV weighs 20.45kg / 45lbs and the Klipsch RP-6000F weighs 22.27kg / 49lbs. This makes the RP-6000F 9% heavier than the Heresy IV.
Here is a comparison of how Heresy IV and RP-6000F's weights compare with the average, max and min weights in Passive Floor-standing class.
Weight
All Floor-standing Speakers
Klipsch Heresy IV
Klipsch RP-6000F
Min
Average
Max
What's in the Box of Klipsch Heresy IV?
Here are the items that are included inside the box of Heresy IV:
What's in the Box of Klipsch RP-6000F?
Here are the items that come with the RP-6000F:
Reasons to choose Klipsch Heritage Heresy IV over Klipsch Reference Premiere RP-6000F
 Driver Setup | 3-way vs 2-way | Have a dedicated mid-range driver |
 Sensitivity | 99 dB vs 97 dB | Play louder with same amount of amplification power |
 Woofer Size | 12 inches vs 6.5 inches | Larger woofer |
 Height | 631mm vs 1010mm | Easier to fit in smaller spaces |
Reasons to choose Klipsch Reference Premiere RP-6000F over Klipsch Heritage Heresy IV
 Max Input Power | 125 watts vs 100 watts | Handle more power from your amplifier |
| Number of Woofers | 2 vs 1 | More woofers |
| Low Frequency Response | 34 Hz vs 48 Hz | Generates deeper bass |
 High Frequency Response | 25k Hz vs 20k Hz | Generates higher frequency |
 Base Surface Area | 1023cm2 (237x432mm) vs 1327cm2 (394x337mm) | Takes less floor space |
 Price per pair* | 1378USD vs 3198USD | costs less (*prices may change depending on the seller, location and time) |
Klipsch Heresy IV vs Klipsch RP-6000F Specs Table
Detailed comparison of specifications| General | Klipsch Heritage Heresy IV | Klipsch Reference Premiere RP-6000F |
|---|---|---|
| Brand | Klipsch | Klipsch |
| Speaker Type | Floor-standing speaker | Floor-standing speaker |
| Power Range | up to 100 watts | up to 125 watts |
| Sensitivity | 99 dB | 97 dB |
| Impedance | 8 ohms | 8 ohms |
| Frequency Response | 48-20k Hz | 34-25k Hz | Drivers |
| Woofer Quantity | 1 | 2 |
| Woofer Size | 12" | 6.5" |
| Woofer Composition | Fiber-composite | Cerametallic |
| Woofer Surround Material | Treated cloth | Rubber |
| Tweeter Size | 1" | 1" |
| Tweeter Type | horn-loaded | Tractrix Horn |
| Aimable Tweeter | No | No |
| Midrange Driver | 1.75" | No |
| Firing Direction | n/a | rear | Physical Specs |
| Height | 631.0mm (24.8") | 1010.0mm (39.8") |
| Width | 394.0mm (15.5") | 237.0mm (9.3") |
| Depth | 337.0mm (13.3") | 432.0mm (17") |
| Weight | 20.45kg (45lbs) | 22.27kg (49lbs) |
| Enclosure | Bass Reflex | Bass Reflex |
| Finish | MDF/Wood veneer | MDF/Wood-grain vinyl |
| Available Colors | Black | Walnut, Black |
| Grille | Yes | Yes |
| Moisture Resistancy | No | No | Connections |
| Biamp Inputs | Yes | Yes | Other |
| Parts Warranty | 10 Years | 5 Years |
| Labor Warranty | 10 Years | 5 Years |
